i would suggest doing a diet something like this:
for breakfast do cereal with skim milk. lots of calcium few calories = very healthy.\
if you drink coffee cut out half and half and either do skim milk or black. definately no sugar.
lunch fruit and lean cuisine. you need to get protien and if you do a frozen healthy dinner your guaranteed to not over eat on calories. not to mention they are DELICOUS.
and dinner do not do chips. they are NOT good for you at all (my guilty pleasure:( )
try steam fresh vegetables and rice with a little butter. i like to add onion powder. so good and filling!
i find that doing frozen things helps me because they are quick handy and healthy.
i hope i helped a little! good luck