Why would you want to fix something which isn't broken?
If you use your computer to make music then start treating it more like an instrument than an iPhone...
My Top Tips (for what they're worth):
1 - If it ain't broke, don't fix it. I spent years fixing things which I'd broken by fixing them.
2 - Don't just buy the latest operating system as soon as it comes out unless you want to spend loads of time on forums asking questions like 'why won't my xyz work since I updated to OSX Lion?'.
3 - Same applies for upgrades, read the release notes and check that there's actually stuff there you need. Only update when you're sure it works and you really need to.
4 - Always back up all your stuff, always, no escuses, do it now if you haven't already.
5 - When you're system is running real sweet, take a moment to make a restore point or backup and label it - 'EVERYTHING IS GROOVY' or something like that.
6 - If you were a musician you'd know how to maintain your instrument, learn how to maintain your computer, rather than fixing it when it is broken from lack of maintenance.
7 - Ableton Live Suite is everything you could ever need to make most music... why fill up your computer with hundreds of mediocre plugins/apps/3rd party gimmicks?
Ableton user for 7 years... and counting : )
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