losing weight while trying to conceive

Brittney
Hey ladies, 
I wanted to see if anyone has tips or guidance for losing weight while TTC? My husband and I are the heaviest We have ever been and think it has been effecting us getting pregnant so we know we need to make changes (not just to get pregnant but to be healthy parents and raise healthy kids). I know there are 100s of different diets but how do you figure out which one is best for people trying to get pregnant? Any ideas?