I found this a while ago, and I think it is one of the most well balanced fitness programs that you can find:http://www.royalnavy.mod.uk/royalmarines/training-tool/index.htm
This is a commando training program which trains the muscles and cardio-vascular fitness at the same time. There is no gym equipment involved, so no matter where you are you can still train and it includes alot of training we are familiar with (for example pressups).
The circuit training (muscles) is personalized to suit you, so no matter how strong or weak you are you can still do the training. There are videos which detail how to correctly perform the exercises, and it gives you a weeks schedule to perform CV and circuit training that is right for you. Everything is downloadable on to your computer.
It is simple the best, and I think that if you want to get fit, strong and healthy there is no better way. Even though this is to enter the Royal Marines, it is applied to everybody as standard day to day training. I hope you find this useful