Known history of uncontrolled sleep apnea syndrome, or sleep apnea requiring supplemental oxygen, and other conditions that could result in excessive daytime sleepiness As per self report, participant has another sleep disorder provided that it is not adequately treated (e.g., sleep apnea without continuous positive airway pressure [CPAP] treatment) No history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease, or requirement for supplemental oxygen Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen Known history of uncontrolled sleep apnea syndrome or other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease or a requirement for supplemental oxygen Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness such as severe chronic obstructive pulmonary disease requiring supplemental oxygen Hematocrit > 50%, untreated severe obstructive sleep apnea, uncontrolled or poorly controlled heart failure (per Endocrine Society Clinical Practice Guidelines) Untreated, uncontrolled Sleep apnea Ejection fraction (EF) < 40% or myocardial infarction (MI) within the past 3 months; known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen; or any conditions that could result in excessive toxicity associated with the benzodiazepine-like effects of MLN8237 Patients who have a known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness (such as severe chronic obstructive pulmonary disease or requirement for supplemental oxygen) are not eligible Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; patients who use continuous positive airway pressure (CPAP) or bilevel positive airway pressure (BIPAP) at night and have controlled sleep apnea syndrome are allowed Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen, or any conditions that could result in excessive toxicity associated with the benzodiazepine-like effects of MLN8237 Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen; or any conditions that could result in excessive toxicity associated with the benzodiazepine-like effects of MLN8237 Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen Patient must not have a known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease Known history of uncontrolled sleep apnea syndrome and other conditions according to enrolling investigator that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen therapy; or requirement of recurrent thoracentesis to manage pleural effusions Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen History of uncontrolled sleep apnea syndrome or other condition that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease. Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen. Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen; or any conditions that could result in excessive toxicity associated with the benzodiazepine-like effects of MLN8237 Known history of uncontrolled sleep apnea syndrome and other conditions that could result in excessive daytime sleepiness, such as severe chronic obstructive pulmonary disease; requirement for supplemental oxygen Have a confirmed diagnosis of sleep apnea or restless leg syndrome Have diagnosed, untreated sleep apnea or sleep apnea suspected by a physician but which has not been unevaluated (as assessed by screening questions) Have a diagnosed sleep disorder (i.e., obstructive sleep apnea or narcolepsy) Motivated and able to follow the demands of the SHUTi program, to keep sleep records, complete self-report symptom reports and make changes in their sleep schedule, including restricting their sleep Diagnosed, untreated sleep apnea or sleep apnea suspected by a physician but which has not been unevaluated, or other sleep disorder Motivated and able to follow the demands of the CBTI-CS program, to keep sleep records, complete self-report symptom reports and make changes in their sleep schedule, including restricting their sleep Have diagnosed, untreated sleep apnea or sleep apnea suspected by a physician but which has not been unevaluated or other sleep disorder Has a self-reported history of diagnosed sleep disorders (e.g., obstructive sleep apnea, insomnia), comorbidities associated with poor sleep or fatigue (e.g., chronic fatigue syndrome), or a job with night shifts Sleep apnea or restless leg syndrome (RLS) Have a diagnosed sleep disorder including untreated obstructive sleep apnea, periodic limb movement disorder, or restless leg syndrome Sleep apnea Participant has known sleep apnea or medically treated sleep disorder (e.g. restless leg syndrome) Patients with a diagnosis of polysomnographically confirmed obstructive sleep apnea or narcolepsy Use of medication for treatment of another sleep disorder, such as restless leg syndrome or narcolepsy untreated sleep disorders such as sleep apnea Have a clinical diagnosis of sleep apnea or restless leg syndrome Experiencing disrupted sleep (determined by Pittsburgh Sleep Quality Index) No diagnosis of sleep apnea or restless leg syndrome that is currently interfering with sleep Has a sleep disorder (including insomnia, delayed sleep phase syndrome [DSPS], narcolepsy, night terror, sleep apnea, sleep walking)