I apologize if this is a frequent topic. Searched the first few pages and also tried the built in search but it didn't seem to be working at the moment. I tried this briefly but with my paranoid self decided against it because I figured it seemed to be getting too warm and based on my typical using of my current old PC desktop, I tend to leave it on all night (usually because I might have been downloading something). This would change because four days a week I'd need to be bringing it with me to school but anyway. I'm sure I should first develop a habit to be turning it off for the nights I'm not downloading anything. But basically, I wanted to ask a few questions about peoples typical setups/precautions/energy settings they use towards preventing any heat issues. As a note my CPU was sitting at around 75C half the time when I was really only browsing the web not doing anything else. Do you keep it plugged into the AC essentially 24/7? Do you perhaps get it to run on the external display while it's open so the fans have a better chance to breath? (This is off the current unibody macbook, October 09 release). Would a good laptop cooler be a wise investment for it? Basically, if you have anything to add that would take away from my worrisome self about it operating at a hot temperature for way too long that would be great. I guess as a last request, any opinions/preferances on using the wireless keyboard/mouse over their wired versions? Could easily still use my old mouse too I suppose. As a note, although mentioned earlier. My macbook is the exact one mentioned in my signature. Late October 2009 model. Thanks! And sorry for the probably incoherent rambling.