When it comes to getting pregnant fast, your partner's health is just as important as yours. If he prepares his body for healthier sperm you'll increase the odds of getting pregnant.
Like you, your man should try to have a healthy diet and be a healthy weight, and should also be thinking about exercising. He can also help his sperm to be stronger by increasing his Vitamin C and Vitamin E consumption which can help with the development of healthy 'swimmers', so to speak.
Stress can harm sperm production so if your partner is anxious or stressed out it could be a good time to deal with that - either by visiting the doctor or finding a way to eliminate or at least minimize the stress causing factors in his life.