I am about to start a DMing a dnd 3.5 game. I have read the three core books over a couple of times. But I don't really have a feel for when the DM should role for characters. My basic gut feeling is anytime you want to keep something that the players don't know about from them... i.e. monsters in the shadow's, secret doors. But I assume if they "listen" or "look around" that their listen and/or spot checks override mine. Does anyone have suggestion for guidelines of how they handle the DM rolling for characters.
With this, are there specific values off of character sheets for each player that you keep at hand? Suggested list?
Thanks any help.

