My friend has found a really decent Baldurs Gate Walkthrough which tells about where all the equipment and quests are, then gives you steps on how to complete the quests. I know that BG2 is much larger than BG but besides trial and error, how do you know when you have all that you can get in the game b4 continuing into ToB?

ps: I have completed the game with a fighter which I really like, but I would like to know about stuff that I might be missing from the game.