Buy 100 calorie packs of kettle corn, and add splenda & onion powder for a "vadalia onion" flavored popcorn. Or even better, snack on a huge bowl of grapes instead of popcorn.
Turn your veggies into smoothies, and have a smoothie with nearly every meal (add different fruits each time). For extra yum, add splenda to your smoothies & soy milk they'll taste like milk shakes! Also, you can add a handful of spinich to most fruit smoothies without being able to taste it!