I think the most helpful thing I am doing is every morning I say aloud: "Today is a No Sugar Day." I'll say it a few times, to my husband or to my kids, or even to myself in the mirror. Saying it out loud makes it more official, so when I'm tempted during the day it's not as easy to rationalize out of my sugar challenge with my endless list of excuses.
Today for my snack I had peanut butter, raisins and cinnamon on celery. Go veggies!