My friends make such stupid bets, I always think they are bluffing but they usually end up having good hands, which makes their bets not stupid I guess. I always underestimate them. As far as bluffing, I usually don't straight out bluff unless I have an open ended straight or a flush draw. Sometimes I'll bluff to clean up a weak pot if everyone else is checking, I'll raise it a lot just so they'll fold, mind you I don't make it a habit otherwise someone will read my patterns, damn there's so much to poker. *sighs*