A shin splint is kind of a general term... They can be painful, and they will only get worse with more running. Sadly, the best advice is probably 'not running' that I know of
Massage it, ice for the pain and swelling, but warmth will help it heal faster becasuse it gets more blood to the location.
Some decent information here:
http://www.runnersworld.com/home/0,1...e=RunnersWorld