Make sure to have lots of fruits and veggies. Also, foods containing zinc are good for you. Foods that contain zinc are things like oyster, nuts, beans, lentils, organic beef, and green peas. Taking a zinc supplement could be beneficial to you as well. Zinc is needed to make testosterone and a shortage of it may cause a low sperm count and male infertility. Sperm prefer alkaline conditions so it is best to have a high percentage of your diet to consist of alkaline foods. You can read more about it here and there is a list of such foods: http://www.rense.com/1.mpicons/acidalka….
Good luck! :-)