One of the most popular articles (at least by page views) here at The Graphic Mac is 9 rules to creating a logo you can live with and still get paid. I wrote it back in 2008, but the advice is still absolutely valid today.
I recently came across 6 common mistakes in logo design at SitePoint. It’s an excellent article by Kerry Butters, and offers some pretty good insights into logo design. While there is some similar advice in Kerry’s article, a few of the points she makes I wish I had included in my article years ago.
If you’re relatively new in the business, or you’re working on your first logo design project, you should definitely take a look at both articles. They offer some great advice.