I like to sit down with, basically, as much as possible. I think itīs the best because the psychological effect of losing will be greater if a bad hour of playing results in you losing half your stack than if itīs just skimming at the top of it.
I also like to rebuy regularly for random amounts. This makes it harder to know if Iīm winning or losing, which I believe is a good thing. When I play, I donīt want to occupie my mind with irrelevant issues such as if Iīm being up or down for the session, but only with making the right long-term decisions.