Welcome to the world of procrastination! I do a very similar thing with my lists if I'm avoiding something, and there can be a range of causes (and a number of different animals I might be frightened of). A very useful website I've found is an organisation called Procrastinators Anonymous. http://procrastinators-anonymous.org/node/386
There's lots of useful information about both the reasons for procrastination, and how to overcome it, as well as a very active support group. You may find both the "signs of compulsive procrastination" and "tools for recovery" useful.