either drink water, iced tea (if you prefer sweet, use Splenda or whatever, not sugar), or diet sodas.
in your coffee--skim milk only.
out alcohol--TONS of calories.
Get rid of the sugar in your house, and replace it with Splenda or Equal.
Switch from white bread to whole grains.
When you make a sandwich, make it open faced--saves a whole slice of bread, but you still have the same number of bites/feel of a whole sandwich.