How do I increase chances of getting pregnant?

You have most likely come across recommendations such as 'have sex regularly', 'eat healthy', 'be at your optimal weight', 'stop smoking', 'exercise regularly', 'use ovulation predicator kits', 'chart your cycle', 'relax'... I have no doubt that you have tried most of these things, without success. Frustrating, right?!

So, what is the thing that helps you get pregnant fast?