Yet another way to give the PC's additional power is to introduce action points. It gives a nice "cinematic" feel to things, because it makes it difficult for the PC's to screw up on important tasks.
I find that I'm usually a fairly generous DM... I don't make any across-the-board increases to class power level*, but I usually hand out somewhat more wealth than the DMG says. On the other hand, the average encounter for my PC's is one or two above their level, instead of equal, so it still works out to be pretty challenging (most combats see at least one character dropping to dangerously low HP's).
*I give each class an extra skill point or two, but that's about it, and they usually use it for non-crucial type skills, like craft or profession, so it doesn't affect balance noticeably.
I find that I'm usually a fairly generous DM... I don't make any across-the-board increases to class power level*, but I usually hand out somewhat more wealth than the DMG says. On the other hand, the average encounter for my PC's is one or two above their level, instead of equal, so it still works out to be pretty challenging (most combats see at least one character dropping to dangerously low HP's).
*I give each class an extra skill point or two, but that's about it, and they usually use it for non-crucial type skills, like craft or profession, so it doesn't affect balance noticeably.