Hi, first time poster here. I have had my ibook for about 1 year and I love it. It's been a treat to discover use for new programs that I didn't plan on using. But after a year, I'm already starting to worrry about the life of my laptop. There have been no problems yet, and I read an interesting thread about the expected life of my ibook, but I was wondering if there is anything I can do to prolong this life? Like, how often should I shut my computer down? Will it run faster if I put all of my music etc. on my external HD and make more room on it? Is it OK to leave it on but shut for long periods of time? Any other tips you can give me about taking care of my ibook and how long I can expect to own this wonderful machine would be much appreciated. Thanks!