Shin Splints. HELP!!

I've recently purchased a treadmill and rediscovered my love for race walking... especially on inclines. After spending 2 hours & 45 minutes on the thing in the past 3 days, I've also rediscovered shin splints.

Since it's been FOREVER since I've dealt with shin splints, I can't recall how to take care of them so they don't turn into stress fractures. Any suggestions? Please don't tell me to lay off the treadmill for a while. I've also rediscovered that I'm a closet endorphin junkie.

Thanks in advance for your suggestions!

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