Sometimes even the best-laid plans go wrong. If you're trying to lose weight and you expect to never falter and never get off track, well ... you're fooling yourself. It's a rare person indeed who can change his or her activity and eating habits and never slip a little bit from their new ways.

Many people who are trying to lose weight succumb to "all or nothing" thinking. As in "I screwed up on my diet this morning, so I might as well just quit."

Occasional slips are just a part of weight loss. Heck, they're a part of life. You may have a slice of cake at a birthday party. You may cave in to a second helping of your yummy dinner. You may skip your fitness routine for a day. And you know what? That's OK. The trick is to not let one little slip become a big slide. One small piece of cake isn't going to negate all of the other efforts you've made toward weight loss. One skipped day of exercise isn't going to throw off your whole routine. Just be sure to get right back on the wagon and keep moving forward. AOL Body has some tips to help you stick to your diet no matter what, including how to regroup after relapse.