I bought a Moongel pad yesterday and consider it a great variation to my 2 existing practice pads (both RealFeel, different size). On the other pads, I usually put a towel on top to reduce rebounds which obviously becomes obsolete when using the Moongel which is specifically designed to have almost no rebound (I find playing doubles on the Moongel pad is pretty hard, but that's judging from 2 hours experience on the Moongel). I'm too lazy to use pillows any more (I don't have a dedicated 'drum pillow').
I'd also vary sticks (length/weight). I got used to playing (exercising with) a heavy stick but yesterday also bought a pair of marching sticks. There's quite some difference, I'm curious to see what progress they will bring to my (beginner) playing.
UPDATE (08/17/2011)
I just bought JoJo Mayer's DVD - JoJo warns not to practice on pillows too much. I guess there's an analogy to stick weight - I use different sticks for practice (the lightest are JoJo Mayer signatures, with The Thomas Lang sig sticks in between, and the heaviest are marching sticks) and use the heavier ones for 'workout' and the lighter sticks for 'speed tests'. I use the Moongel pad in ca. 30 % of my practice playing. Just find out which combination works best for you.