GameFAQs is a goldmine if this is about video games. Walkthroughs, reviews, message boards, the works. For music, check Allmusic.com — they have great write-ups and 'if you like X you'll like Y' recommendations.

Don't be afraid to buy used. eBay and Half.com have tons of stuff for a fraction of retail. Pawn shops too. I've gotten some of my favorite stuff secondhand. As long as it works, who cares if it's not brand new in the box?

Honestly just dive in. You learn this stuff by doing it, not by researching it forever. I spent months reading about getting started instead of actually starting. Looking back I wasted a lot of time being scared to begin.

I've been into this hobby for over 10 years and the best advice I can give a beginner is: don't overthink it. Start with something affordable, learn the basics, and then upgrade once you know what you actually want and need.

Borrow before you buy. The library has way more than books — CDs, DVDs, even some equipment. Try things out for free first. No reason to drop a lot of money before you know whether you'll stick with it.