One thing that has helped my game is the "Players roll all the dice" rule. The players picked it up in a single session, and after three sessions, I now get dirty looks and nasty comments if I pick up a 20-sider during combat by accident. The players honestly love it, and it's significantly less work for me (All you do is substitute a d20 for 10+ in the character's AC, and 10+ for the d20 in the NPC's attack. Ditto for NPC spell saves. In PC vs PC combat we've ruled PC's roll a d20 for both attack & defense - it's pretty cool.)
