That often ignored check
I learned a check from my human performance textbook that I took to heart, but have never even heard mentioned in the flying clubs; the 'I'm Safe' check.
Illness,
Medication,
Stress,
Alchohol,
Fatigue,
Eating.
Under this check you check yourself before flying. Do you have any illness that might affect your flying skills, (a cold, perhaps)? Are you on medication, if so what affect is it going to have on your flying ability? Are you stessed (e.g. by arriving at the aerodrome late)? How many hours ago did you have your last drink? Are you tired (e.g. from long working hours)? Are you hungry; (if so eat something before you go flying: I carry biscuits in my flight bag as emergency scoff).
I suppose many if not most private pilots must have come across this check when studying for ground exams, but I strongly suspect most give it a miss when the weather is good and the aeroplane is waiting.
Broomstick.