1. You will remember things better and it will enhance your ability to solve problems.
2. You will find it easier to lose weight. Your body naturally produces leptin when you get enough sleep (a hormone that suppresses your appetite).
3. You'll be less likely to die in a car crash. People who don't get enough sleep tend to fall asleep for short periods when they're driving — just for seconds at a time, but that's enough to cause an accident.
4. Getting enough sleep will help you stay in a better mood, and your mood has consequences. You will do better work and get along with people better if you are in a better mood. And better work and better relationships have significant long-term consequences.
5. Your cardiovascular system will be healthier, so you're likely to live longer.
6. Your immune system will be more powerful. You're less likely to get sick if you regularly get enough sleep.
If you have trouble getting enough good quality sleep, read the tips in the article (go here to read it). If you want to be healthy and stay in a good mood, one of the most important fundamentals is to get enough good quality sleep.