Side Stitches?

1. Your breathing. Keep your breathing even while you're running and focus on your breath. 

2. What you're eating before you run. What you eat ahead of your run can impact your gastrointestinal tract causing agitation. Notice if you get side stitches when you eat a certain food and then try not eating that food the next time to see if it helps. 

3. Elimination. Make sure you've completely moved your bowels before you run. 

4. Hydration. Likewise, make sure you're hydrated. 

Finally, if you do experience a side stitch. Slow down and massage it using moderate pressure with the heel of your hand. It will usually go away in a few moments.