Katie Goldberg, RDN, LDN, of EKG Nutrition, said that while it's important to reflect on how certain foods make you feel so you can go on to make healthier choices, you should never dwell on negative feelings. "Instead, look to the day as a new beginning and a new chance to assess what your body needs," she said.
Registered dietitian Kimberly Gomer, MS, LDN, director of nutrition at the Pritikin Longevity Center and Spa, agrees. "Don't beat yourself up for what you ate the day before; no good comes from beating yourself up," she said. "Focus instead on the present and praise yourself for laying the groundwork with a post-holiday plan."