As you may know, exercise increases mental acuity. By training in the morning, you'll wake up faster and be mentally alert at the crack of dawn. It'll also give you time to plan your day effectively before getting to work.
By completing your workout early in the morning, you're also guaranteeing that you'll actually do it. After a long painful day at work, it's easier to make excuses or other plans in order to skip a workout. In the morning, your body and mind are fresh and ready to rock 'n' roll. Just remember that being disciplined is the key to staying fit, so start losing your snoozing habits.
Finally, have you ever noticed how healthy you feel after a workout? And how you become turned off by greasy, unhealthy food? That said, training in the morning will force you to start watching what you eat from the first meal of the day. It will help regulate your appetite and set a "healthy mindset."
In addition, a good morning workout provides that rush of adrenaline and a sense of accomplishment that will stick with you throughout the day.
HEY! It's still exercise! 
