Plan in advance for any high-sugar foods you will eat. Have insulin on hand for any sudden increases in blood sugar levels, and make sure that you monitor your blood sugar levels afterwards. The important thing to do is to be aware of how you're feeling at any point after the meal.
Do not skip any meals if you are a diabetic. Doing that will cause you to be more hungry when it is time to eat and you will probably eat much more than you would have otherwise. This will lead to higher than usual blood sugar levels so it should be avoided.
A big myth with regards to diabetes is that people with diabetes must completely change their diets and switch over to special diabetic foods. However, this is simply not the case. With anything, you can eat anything as long as it is in moderation and if you are exercising and taking your insulin according to how your physician prescribed.