That means you have to make a conscious effort to eat properly each day and at regular times. It also means that you have to get in that daily exercise. It's so easy to lay on the couch and watch TV, but there are so many fun things to do during the summer from bike rides to swimming pools. Whatever activity you decide on, try to do it for an hour each day.
When the school year comes, you'll be healthy, active, and ready for whatever the new year brings.