Make life easier for yourself. Make sure you have a big hearty dinner planned, spend a bit of time making something a bit fancy if u have time, it makes u feel spoilt and satisfied when u have something a bit out of the ordinary. Then stock your fridge with stuff to munch, so when u get the munchies u can just grab bits and bobs syn free. Stuff like SF jelly, carrot/celery sticks and free dip, blueberries, etc.
Have u tried posting a diary, is it that ur not planning and having big free meals, so u end up using up syns on dull stuff thenn having extra syns to have the fun stuff?