I fight it by doing something - anything - that will help me when I'm ready to start. I'll clean my workspace, gather the tools, start the IDE, write down the phone number, etc. I often end up tackling the whole task this way.

In the long run, it also pays to make projects easy to pick up again. It's harder to cook when the kitchen is dirty, to read when you lost your page, or to code when starting the project involves 20 different commands.