I learned that firsthand when I moved away for college. People warned me about gaining the Freshman Fifteen, but I actually ended up losing it. My secret? Being too poor to eat like a pig at a trough and having to walk or bike everywhere. More recently, I noticed I had gained weight so I stopped getting second helpings at dinner and took the stairs to my office instead of the elevator. It may not be that easy for everyone, but it is that simple.