How do I remove myself from a block list?

Firstly you should identify the cause of the traffic that got you on the list in the first place. There are primarily two reasons for this: -

  1. 'Open relay' i.e. a badly configured mail server and firewall
  2. You have a virus on your computer or network

Then once you have checked and resolved these issues, responsible block list owners should have facilities for you to remove your address (you may need assistance from your ISP).