I have a fairly new MacBook, bought it in November. It's the white kind, not the new one. I love it, have been really happy with it. Lately, something has been happening where I go to wake it up and it stays asleep, and i have to power down, then back up. Then it's fine. In one case the mouse froze up and I had to do the same. I did software update, it's up to 10.5.6. I was thinking now i would run Disk Utility, and run scripts in Onyx. Does this sound like a good plan? Any other suggestions on maintenance to prevent this issue? Thanks so much for any replies!