ATM all the way baby!
ever since i put that on, set it up so that it kills all apps every half hour (except the ones i explicitly exclude) i have had 95% smooth operator status!
i havent cleared my cache since the last rom actually...
i honestly believe coming from winmo has taught me better mobile management.
its simple, you only need to open what u r using at that time!
if u want to multi-task (like i do) i would SUGGEST ATM (advanced task manager). clearing cache can only help....though i only use the dolphin browser an i changed the settings to save my cache to the SD. with winmo, if you had 15megs of ram...that was pretty good (on an uncooked rom anyway). i maintain 60-70megs free at all times so...im always coasting!