Looking for some fat burning exercises

I told my husband that I wanted to be slim again just like before.But i also told him that I am having a hard time on losing weight.he suggested what if I look for a fitness program.He said maybe there's some best fat burning exercises that are available for me to check out.Maybe trying this method will finally help me to lose weight.I hope so coz it's been so long that I wanted to lose weight but I always fail.Hope I have the courage to really be serious in exercise and dieting so that I will have a good result.