A number of months ago one of my roommates introduced me to the wonder that is the green smoothie. They're pretty amazing. Essentially you add fresh spinach to whatever smoothie you happen to be making and it turns your smoothie green without changing the flavor. So instead of having a healthy fruit smoothie with half your servings of fruit for the day, add some spinach and then you've got half your fruit and vegetables. A painless way to eat veggies, what could be better? I will warn you though, depending on what fruit you put in your smoothie the color of green can vary dramatically. If you're looking for a lovely light green I'd suggest more yellow fruits (like pineapple and mango).