The Dark Heresy book points out that GMs can give permanent fate points for deeds they deem worthy, and restore spent fate points for in game actions or even "halfway" through a session. In my 40krpg campaigns, I've been pretty sparing with handing out permanent fate points (e.g. save a world from horrendous threat might do it) and have only occassionally thought to restore fate points in game. Just to note, my various groups of players haven't had to burn many fate points and several tended to "save" them, usually ending sessions with one or more. I've just started an ascension campaign, so there's no shortage of fate points in the party (at least to begin with
).
So how do you fine people handle fate points?