I think you just ride it out. I'm at a wedding this week and one of the people at the wedding is a Braves fan, he said you just have to live with it. He'll hit like .050 for 2-3 weeks and then all the sudden is red hot.
Reminds me of some of the slumps Soriano used to get into back in the day. Different hitters of course but Sori would be absolutely putrid for a long stretch and then all the sudden he hits like 7 HR in a 6 game stretch and almost every AB ends in a line drive somewhere.