Depends, by fit I'm going to assume you mean lose body fat and gain muscle. Some people like to work on both, but that's for a long term/lifetime goal. If you want to just get fit for sake of summer, you're probably looking more towards cutting first, then decide to bulk if you're happy where your at.
With that said, it seems you want to cut...so I'd look into something like Tabata/HIIT it worked wonders for me, very first time trying it I dropped 8lbs in 2 weeks. (bf% I was unsure of, but I know it wasn't water weight)
Most of Tabata/HIIT is basically heavy cardio, with body weight exercises, but not limited to that only. (things like pushups/burpees/etc.) HOWEVER, be careful injury is the opportunity to put you off for a while, so start slow. In a nutshell, HIIT/Tabata is 2:1 workout:rest. Example: Jump rope for 1min, then rest 30 secs for total time of 15 minutes (can vary all of this any way you like, just keep 2:1 ratio, and only go as far as you feel is needed. Again, Don't over do it.)
Nutrition wise, find out your max calorie intake and go 10% below it. (If you feel that's plentiful enough, decrease it, just don't go below 20% of your calorie intake) You will need to count calories best you can. You can guess a few by using things like google to help find out how many calories is in it, but packaging and weighing your food is the optimal way to find out.
28-Feb-2014 20:40:16