You might want to consider fasting on certain days. Over the festive period we tend to eat a bulk of tasty foods and bigger than usual meals at lunch and dinner times. This can hold a bit of stress on our digestive track. You can aim to fast for 8+ hours to 16 hours a day to help you and your tummy prevent cramps, levels of fatigue and in-digestion by simply reducing your eating time (let your tummy rest up and stop eating) especially on the high caloric foods (crisps, sweets, etc). We would advise our clients as personal trainers to consider skipping the earlier meals in the day and save time for the body to work on the bigger meals in the evenings (but this can also be applied in the opposite direction). This will also hold some benefit to the amount of calories you will be consuming on a daily and weekly basis. Don't forget your colour, keep a mindful eye for salads and veggies throughout your meals, fruits also for morning meals. Making a small bit of effort and adding colour to all main meals (1 fist size for general guidance) will increase our fibre and micronutrient intake during a festive season that might be often considered a time for higher calorically dense foods to be consumed such as chocolates, crisps, cakes etc.