The simplest way to lose a tummy, is to simply square your
shoulders back and suck in your tummy daily and regularly.
I find that men with bad posture, like haunching their backs,
usually develops or have their tummy more obvious when walking or
talking to people.
You might also want to consider adjusting your diet to include
in more cruciferous vegies like Brocolli, Cauliflower, Kale and
even brussel sprouts. Have them steamed, stir fried with garlic and
blanched will do the trick.
They are known to help burn the deposited fats at your tummy
instead of your carbo.