Typography

What's the top thing that people screw up when it comes to book covers?

I would say it's the typography. I found an article to help with that: http://psd.tutsplus.com/articles/techniques/a-20-minute-intro-to-typography-basics/

Not only is a great article, but I've been waiting for an article like this to be online.

Rinse and repeat this when you design: Negative space is important. Margins are important. ^_^ Just saying that.

Thanks for the info! I found it very helpful.