I strongly second
anarkia1ces vbmenu_register("postmenu_810147", true); advice about changing the water pump when/if you do the timing belt. You've got to take all the belts off anyways to change the pump, no need to do it twice (or pay someone else to do it twice, 'cause most of the cost for a mechanic is due to time/labor not parts for this job). I learned that the hard way.
One other suggestion is when you replace the air-filter, spend the extra $$ and get a K&N filter. It's more expensive than a generic replacement, but it gave my wife's '99 Camry about a 10% boost in fuel efficiency. Also they are re-usable and can last you as long as you have the car (if properly cleaned). As long as you keep the car for more than a few months it will definitely pay for itself and you'll also (probably) notice a little better performance. Just my $.02
Good Luck.