I'm intolerant too. I use the Lactaid Ultra pills whenever I think I might have a problem. Yogurt is the only dairy product that doesn't hurt (the lactose is already broken down by the yogurt cultures.) Chocolate shouldn't cause a problem though - in fact, chocolate should help - they (whoever 'they' are...) suggested eating chocolate with the dairy to cut down on the effect. Hard cheeses (aged) are also better tolerated than soft ones. I just keep the 'milky pills' with me all the time - they're small enough to swallow without water, and I take one with the first bite of questionable food.