Don't smoke or drink alcohol and exercise on a regular basis. Loose excess weight if needed and eat high in protein low in fat foods. Try to reduce stress levels.
There are several ways to increase sperm count. One way is to wear boxers instead of briefs. Don't sit in hot tubs because the water will kill sperm or lower your count. Eating more protein and extra vitamin C can help.
I don't think there really aren't any ways to increase sperm count. The best thing you can do in order to have a pregnancy happen is to use no birth control of any kind.
Refraining from sex can make your sperm count build up. If you do not do it all the time, you will have time for it to build up. Do not drink a lot of coffee because caffeine can make your sperm count go down. Stress caqn cause it go go down also.