I always make it clear beforehand that there are no resurrections in my campaigns. It might happen during the game because of special circumstances or the use of artefacts or some such, but neither characters nor players know beforehand if or how that will happen.
I know this is very personal, but I just can't stand characters coming back from the dead cheaply. It's a problem in books and movies and it's a problem in games as well.
Also I find that a session just gets interrupted if suddenly the party needs to carry a body around the dungeon, retreat to the nearest place with a priest or somebody with scrolls, get the money together and stuff and then the player decides he'd rathe rmake a new characater anyway and has his character refuse to come back to life. Waste of time, waste of resources, waste of a perfectly well running campaign, waste of what could have been a dramatic moment.
Character deaths don't happen often in my campaigns. At least I don't think so. With 6 players we have had 1 death so far in about 8 sessions, which happened near the end of the session, so he lost about 20 minutes in gaming time altogether. Furthermore now his death means something. He stood up to a dragon while trying to defend his village, I think it's pretty heroic to die that way. Bringing him back would just be a let down I think...
