Most of the hills around here are "rollers" just hill after hill after hill. None particularly long, but up to 20%.

I have a power meter, and it's wonderful for pacing things. (my FTP is ~190w) Before I get to the climb I try to hit 180-200w for about 30s to get some momentum, then sorta coast as the incline ramps up until I can pedal my usual 95rpm cadence at about 330w. If it steepens out or goes really long then I have to really try to get down to about 250w or my HR will just blow up (which my doc doesn't allow). As I get better I can go longer and longer at the 330w+ level before my HR blows up. But it really helps me get to the top if I can start putting out the watts before the climb even starts.