Step 1: find a flabby bit of your body.
Step 2: grab aforementioned flab. Not too tight, mind.
Step 3: scowl at aforementioned flab.
Step 4: make threats on aforementioned flab's life, existence, mother's grave, etc. Remind aforementioned flab that its days are numbered and that it has no recourse, no right of appeal and no way out.
Step 5: cackle menacingly at the awesome power you wield over your body.
Step 6: repeat daily.