Help!! Cowboy Trouble!!

Girls!! I need some major advice!! My husband and I are going to a Dallas Cowboy game next month! I am overweight and want to lose weight for the game! I know a month is not near enough time, but I want to try! I want to live a healthier lifestyle so I feel better about myself and feel comfortable when I go out in public. I am not extremely overweight. I am a home health nurse so I am always on the go which makes it difficult to eat right. I need any advice that you can possibly give!