i been plannin on gettin in better shape during the summer too but work and school got me busy. im definitely going to start late july early august though.
like some people say eat a lot of protein chicken, steak, tuna & fishes (best source: low fat, high protein), bread, beef, eggs (i like them boiled for breakfast). u want to eat 1gm of protein for 1lb of body weight daily but its okay to eat half sometimes if you cant make the count. just eating a lot of protein is what counts.
you as well want to get some carbos, veggies, and fruits into the system as well.
breakfasts are the most important meals. eat 90 minutes or around there before and after an hour or two of workout. 6 decent smaller meals instead of 3 big meals a day.
work out different body parts and make the muscles guess the routine variation. apply more effort as you progress.
protein shakes are okay and protein bars but dont stay on like creatine for a long period of time. just eat what you know is healthy and balance your diet appropriately.
that's all i know from the top of the dome.
i found this site very useful as a guide on building muscle mass healthy if you are really interested....
www.gain-weight-muscle-fast.com/