And on the subject of gear/flap levers. Don't be in a hurry to retract the flaps after landing - make a conscious effort to identify which lever you are about to move. I know there is a technique of retracting the flaps to increase wheel braking effect but there is the obvious risk of mis- selection. Having nearly done that myself I made it a rule to touch the flap lever - say "flaps" - and only move it when satisfied.