Here is some info I'm sharing from a newsletter I received from Jeff Galloway. Hope you'll find at least some of it useful!
"Some Solutions to Problems While running/racing:
Stomach problems when running: Eat nothing for breakfast. Every 2 miles, eat 30-40 calories of sugar. Pure sugar has produced the fewest number of GI issues: sugar cubes, life savers, gummi bears. See Running and Fat Burning for Women.
Too many potty stops: Control fluid intake before the start of the run. Drink 6 oz of water upon rising and no more fluid until the start of the run. My rule of thumb during a run is 2-4 oz every 2 miles (60-120ml/3-4km). Most runners I've worked with don't need to drink on runs less than 90 minutes. See Running Until You're 100.
Muscle cramps or pains beyond a certain distance: Insert more frequent walk breaks. Those who have muscle issues when using a 3-1 ratio of running to walking will usually eliminate the problems by using 1-1 from the beginning. It also helps to slow down at the beginning and to increase length of longest training run beyond race distance. See Galloway Training Programs.
Need motivation to get out the door? Set up a step-by-step plan and mentally rehearse it the night before. Focus on each step at a time. See Mental Training for Runners for a series of plans for various "situations" or read a page in 100 Reasons to Run Now!
Run Faster : Follow one plan-don't try to mix and match from differing sources. "
Note: This info may not be applicable for all runner.
Finished: Walt Disney World Marathon, January 13, 2013.
Finished: Disney Princess Half, February 2013
Finished: Orange Blossom Half and 5K, March 3, 2013
Finished: Divas Half, N Myrtle Beach, April 2013