Conversionrater has a great post on generating a traffic spike for your blog.  I’ve been seeing traffic spikes of the types mentioned.

One type of traffic spike is generated when I write about Paris Hilton and/or Sexy Girls - that’s sure to get someone’s attension, particularly in the Arab Countries - at least, that’s what I noticed. A couple of weeks ago I had a 1000 visitors a day for a couple of days due to Adwords advertising. I got a traffic lift that remained afterwards.