TTC a boy, tips please?

We have 3 beautiful girls. Twins that are 2, then I have a 13 year old girl from my first marriage. My husband really wants a boy, he is the last boy and wants to be able to carry on the family name. We will be happy with a happy healthy baby, of course. Anyway, I've read lots of tips and articles about trying to consieve a boy, has anyone had ant success with doing so or does anyone have their out tips? Oh, any yes, I know hove the science of it works.