Hello! I've been so impressed with the responses to questions on this forum that I thought I'd throw my own out there. Next week, my G4 iBook turns one year old! This is also the first anniversary of my switch to Mac. While I've been really happy with my iBook, I've noticed that it's slowed down a bit over the year as I've added programs, files, etc. I've noticed the slow-down most in tasks like computer start up and the opening of programs (everyday ones like Safari, Mail, Word, etc.). I have 1GB of RAM and a 100GB hard drive (my stuff occupies about 50GBs). How much of a slow-down is normal? I know there are probably numerous factors that would affect speed, but I was wondering if there's anything I can do to optimize my computer's performance. I'm not very computer or Mac savvy, but I just feel like there's some sort of "spring cleaning" I can do. Gosh, I feel stupid asking this, but should I reformat my Mac periodically? Can I even reformat my Mac? I have some spare time this weekend, so I was planning on backing up (using my DVD burner), anyway. Any suggestions? Thanks in advance for your help!