This guide assumes familiarity with the basic mechanics of the game. If you’re completely new to Angband, check out the user’s manual and just start playing, get into the dungeon and try, well, whatever seems to be prudent. You’ll probably die rather quickly, but the following will make much more sense to you if you have just a little actual gameplay experience.
This guide was written for Angband 3.5.0, and is now a little out of date (although the worst of the obsolete stuff has been cleaned out). It is still a handy source of hints and advice; just don’t take it as an authority.