>>500
Dunno if it's much help, but for things that I'm doing for fun I've found that it's a lot easier to keep several balls in the air than to do them one at a time according to some checklist or schedule (which often ends up with nothing getting done). It helps with getting started too, when I know I don't necessarily have to finish whatever I'm starting before moving on to something else. It took me until recently to figure this out, too...

For "important" things (outside of stuff I'm doing with others or otherwise critical tasks), though, I still haven't figured it out. I'm technically procrastinating on them by writing this...