I could rant on and on about this topic. I am going to put this as simple as possible:
Eat less and eat right, get moving and stay moving.
Yep, that's it...the key to beginning to get into "shape". I have included the "World Class Fitness in 100 Words" below:
•Eat meat and vegetables, nuts and seeds, some fruit, little starch and NO sugar. Keep intake to levels that will support exercise but not body fat.
•Practice and train major lifts: deadlift, clean, squat, presses, C&J, and snatch. Similarly, master the basics of gymnastics

ull-ups, dips, rope climb, push-ups, sit-ups, presses to handstands, pirouettes, flips, splits, and holds. Bike, run, swim, row, etc, hard and fast.
•Five or six days per week mix these elements in as many combinations and patterns as creativity will allow. ROUTINE IS THE ENEMY. Keep workouts short and intense.
•Regularly learn and play new sports!
Seems easy enough doesn't it? I consider my self in "fair" shape (that's because as you gain work capacity, your goals change)....but compared to the general public I am extremely fit. I am active duty military, and have always been considered a PT (Physical Training) stud....even at my old age and being as broke (injured) as I am. I am a certified CrossFit coach (yep, big fan of the Kool-Aid.....if you haven't tried it, I highly recommend it), and a huge advocate of body weight training.