Weight loss help. Please.?

I am 25 years old and insulin dependent. I am trying to lose weight so that way I can feel better about myself and for my kids. I do weigh currently 206 lbs. I was 210. I want to lose at least 10 more pounds by September 1. I do walk where ever I go if it is a reasonable distance like to the doctors or other places. I do exercise when I have free time to myself. I want to know if there is any special work out that I could do to help me lose my baby weight. I am done having kids so I am not worried about trying to gain weight for that.