Here are a couple of useful websites for those interested in type. The first is Fonts in Use. It's a gallery of, you guessed it. Search for typefaces used by a particular industry, a particular design format, or look up particular fonts. Let's say you're considering using Cooper Black on the flyer for your new high-end hair salon, and you're wondering if it could ever look anything but dated and kitschy. Check out the designs users have shared and form your own conclusions (The answer is no.)
If you want to impress your friends because you know what the little doohickey is called that hangs off certain lowercase "g's," Aaron Bloom's Typography site will help. Read about type anatomy and classifications, consult the glossary, or take a short quiz to see if you learned anything.