1. Count your troubles, name them one by one--at the breakfast table, if anybody will listen, or as soon as possible thereafter.You can read the rest here.
2. Worry every day about something. Don't let yourself get out of practice. It won't add a cubit to your stature but it might burn a few calories.
3. Pity yourself. If you do enough of this, nobody else will have to do it for you.