I suspect the phenomenon is different for each person. Myself, I have little problem procrastinating household chores--they feel easy and not particularly stressful. For whatever reason, it hits me hardest for tasks that I "like" to do, like programming. It's quite paradoxical.

It's certainly true for me that procrastination is essentially avoiding a form of anxiety. But I don't think there's some deeper, larger problem. It feels more like "choking", just a fairly specific learned, maladaptive response. At some times in my life, I've pushed it into the background and become more productive, but it always seems to creep back.

Drinking seems to reliably reduce it, but I can't very well program lit all day.