Third time's the charm!

Tonight I ran the University of Memphis True Blue 5k for the 3rd time.  I PR'd with a time of 26:16 and placed 2nd in my age group, and that was with two brief walk breaks due to side stitches.  Man, I've got to either learn to pace myself in the beginning or some new breathing techniques.  Anyone else have trouble with side stitches?  Tricks...recommendations?