Never skip breakfast! It will make you weak for the rest of the day.
Instead of an apple, have and apple and a bannana. Its a little more for more energy, also, dont eat so low-calorie. Have small snack in the day if you arent exactly hungry. Drink something like juice instead of water, but keep water in your diet!
I like raisins, strawberries, peaches, bannanas, cherries, and blueberries.
Also, if you are craving sweets then find a cake recipe and use rice flour to replace flour and Splenda to replace sugar. Splenda is a 0 calorie artificial sweetner WITHOUT aspartame(which is bad for your body)
If you want to shape up for summer start jogging/walking/stretching and lifting light weights. Before you work out, make sure you stock up on protein. Protein helps your muscles build easier. Try fish,eggs, and low-calorie protein bars.
A gluten-free protein bar is GenSoy in Chunky CHocolate peanut butter fudge.