Stupid Side Stitch

Well, I thought I was over getting a side stitch, when I run, over a year ago. *sigh* I went to run 4 miles last night. It was a beautiful evening and not so hot. About mile 2, I got this horrendous side stitch. On the right side, just like old times. I started running with my arm over my head and breathing out through pursed lips. I'm sure I looked and sounded ridiculous. Well, it finally went away at about 3 1/2 miles... I wish they would figure out what causes this pain in my butt (er, side rather)!! It totally ruined my run.

Anyone have any tricks for getting rid of the dreaded side stitch any quicker?