I learned a long time ago that I could cure the pain of procrastination by opening an editor and typing

  int main(int argc, char **argv) {

I still do this... just opening the appropriate program -- emacs, MS Word, whatever -- and typing a line that looks like it might actually be useful is enough to get me started doing real work, even when I have no idea how to complete the project (which was what was stopping me from starting in the first place).