For families who conceived a girl first, what did you do differently (sexually, diet, sexual position, timing of sex) to conceive a boy the second time?

Asking because we (both in our mid-30s) have a baby girl but we both want a balanced family and to conceive a boy in the next couple of years. I've seen MANY families with consecutive same-sex siblings and we are hoping to do things differently. As rare as it is to see a boy conceived after having a girl, especially given our age, what's the secret to change the trend?