I recently switched back to Apple after 20+ years. I purchased a powerbook....details below. During my time away, everytime I purchased a new PC, I would try to check for certain hardware issues. For example, I would immediate turn the computer on for a couple of days straight to make sure the CPU worked properly. Not sure if that really helped or not. I always felt like 1 year later I would find a problem when I tried to use a new feature. Anyway, I don't really want to purchase AppleCare and would prefer that this thread not turn into a salespitch for it. But, are there certain things I should be checking for on the hardware and software side and how can I do it. I would like to do as much now before the 3 month phone support stops. Already have run Apple Hardware Test and seems to work. If anyone has any routines they practice with new macs, please let me know.