How to pick your new domain name

14th colony have a nice little list on how to choose a domain name. I disagree with number 4, in the UK use co.uk but aside form that its a great list
  1.   Aim for obvious (like your company name or what you do).
  2.   Keep in mind the role your domain name will have on your business brand and identity.
  3.   .com is the best TLD. If you sell stuff commercially, people will expect your site to be a .com (www.yourdomain.com). And people type ".com" by default.