A key foundation for any healthy lifestyle is moderation in the things someone eats. For most of us, moderation means eating less than we do now. More specifically, it means eating far less of the unhealthy things such as refined sugar and saturated fat and more of the healthy things such as fresh fruit and vegetables. Eating a certain amount of calories is also important. Calorie intake also translates into how much physical exercise you need a day.
Keeping up with a good sleep schedule is another component to having a healthy life. the only sure-fire way to not be tired during the day is to sleep good enough and long enough. The recommended time spent asleep is around six to eight hours a night. It's also recommended that people shouldn't take short cat-naps during the day. The reason being is that the brain goes through different sleep cycles while resting. Usually, these cycles last about an hour and a half, and when someone wakes up at the very end of one of these cycles, they'll feel well rested. However if someone were to wake up in the middle of one of these cycles, they won't feel any better than from when they first went to sleep.