Hours of sleep last night
Hours awake at planned departure
Illness / physical ailment
Stress level
Time pressure
Medication — Taking any medications (OTC or prescription) that could impair
Alcohol — Consumed alcohol within 8 hours or feeling aftereffects
Fatigue — Long duty day, physical exhaustion, or cumulative tiredness
Emotion — Emotional upset, distraction, anger, anxiety, depression
Dehydration or missed meals — haven't eaten or hydrated properly
Hypoxia risk — planned altitude above 10,000 MSL without supplemental O₂
Major life event or distraction (moving, divorce, financial crisis, etc.)
Passengers are impatient or pressuring departure
I feel obligated to complete this flight
This is a training flight (extra workload / unfamiliar maneuvers)
This is a checkride or evaluation (heightened stress)