Further to QNH's notes - Don't forget to retard the throttle after T.O., easily forgotten but gives you carb. ice protection
Interesting. In this month's Pilot, in the "Fly Like a Pro" feature, one of the contributors reckons that throttling back on take-off (he references a Chipmunk) could lead to overheating as there isn't the extra gasoline sloshing around in the cyliders.