Just though I'd say that there's a new tip per week (if you're unfamiliar with some iTMS podcasts), and that some of these functions are only available in Tiger, which is what the Geniuses and employees are using in the podcasts. Tried some myself. Still, they're pretty useful if you didn't know about them or need to refresh our memory.

Anyone is welcome to add here if they find some good tips. I also suggest Mac OS X hints. They've got some great stuff.

http://www.macosxhints.com/

Hope this helps.