Yes, once a week or even more frequently if you notice your memory getting low. About 12 MB seems to be the start of the critical level. That's when stuff can start to disappear. I used to check my free memory every other day, just to be safe. Alt + Shift + H should bring up an info screen and if you scroll down you'll come to Free Memory. Quick and easy way to keep an eye on it. The good news is that with the new Blackberry Bold and OS 18.104.22.168 the memory leak looks solved. So there's hope for everyone as the new OS begins to trickle out to present models like the Curve.