I have a hypothesis that people who do work where progress is difficult to measure are more likely to procrastinate by doing very tangible things rather than doing something passive like watching TV. I know many other bloggers have written about how they'd rather clean their kitchen, organize their closet, or weed their garden than work on whatever pressing but seemingly endless project is on their plate. For example, Jon says he knew when his mom had a big writing deadline or presentation coming up because they'd have a dozen loaves of bread in the kitchen. Baking, cooking, cleaning, and organizing are tasks where progress and product are clearly identifiable. They're immediately satisfying.
I know I use housework (and blogging) to procrastinate on whatever slowly progressing research task I need to tackle. I think I'm going to start referring to this type of procrastination as "baking bread," and I hope Jon and others will call me out on it and remind me to get back to work on the less immediately satisfying stuff with the bigger payoff.