when to rebuy?

[zaphod]

I try not to loose more than 5-10 % before i refill. Often i refill before. I heard somebody argue that you should wait to refill to the max until you get the button, and i think this makes sence.

I think the poker sites should let you automatically refill. A box where you say: "Refill to the maximum whenever i dip below my starting stack":
It is not fun when this happens: You looses a big pot, so now you only have 5 BB left. Before the next hand you are not fast enough to refill and bang there is your AA with lots of action ahead of you.