I haven't had any success with this method but have had some with diet change. However, I did run across this on another forum I read from time to time:
He gives examples of people who have had success and his own as well. They used fibers, miralax, and other ways to get things moving again. I personally use Magnesium Citrate once in a while because I feel I need more Magnesium and it is also an osmotic laxative, working the same way Miralax does. This form of mag is super cheap too, about $1-2 a bottle.