Any good exercises to help "tone up"?

I am headed off for a vacation in just about a month and a half and my "winter body" just won't cut it at the beach. I am looking to "tone up" my mid-section (mostly lower abdomen) as well as my arms and legs. I have started back up on a calisthenic regimen 5-6 days a weeks, and will be incorporating in some cardio in the next 2 days or so. But i have really fallen off of the exercise/diet wagon these past winter months and I have 39 days to get myself ready. I know the largest part of this is really diet, and I will admit that I love to eat, and its mostly sweets though. Any help to get myself ready would be fantastic. Also I would also love some meal plans to help me through as well, if anyone has any good ones that they like to follow! Thank you!