You should plan out your meals with emphasis on what you will be doing in the next 3 hrs before each meal!! You should be eating 5 meals a day. If you are going to be less active only eat 400-500 calories in each meal. More active you need to bump up the calories to 600-700 calories. If the next meal comes before a workout then you need to consume 800 to 1200 calories. To insure enough energy for the training session.
So the plan is to consume the most calories when the demand is the highest.