WordPress: How to survive being slashdotted or digged?

Being propulsed to the home page of a famous web site like SlashDot or Digg is intensely satisfying for the author of a blog, but it usually results in an intense traffic storm for your server that may not survive to the typhoon even if it comes from friends.

DownloadSquad grouped some ideas on how to optimise your WordPress site around this risk or when you fall under that kind of pressure.