Don’t let one day, one week, or even one year of blowing your diet affect your choices today and every day after. Pick up where you left off and start making those changes again. Of course we all fall into temptation and have that piece of cake or all those slices of pizza, but it is truly how we handle the meals after that determines our success.
Start by accepting the blunder. It has happened and you cannot change what you have already eaten, but what you can change is your next meal. By making a good, healthy decision the next time, you will feel better mentally and physically and avoid falling into a slump possibly leading to another poor nutritional choice.