How do I get a woman pregnant?

Timing. A women conceives in proximity to when she ovulates. This typically occurs mid-cycle. Intercourse during those days increases your chances. Also, if you have been trying for a while, consider a sperm count. Up to 50% of infertility is due to male factor.
Have intercourse. Anyone having intercourse without birth control or condoms is at risk of getting pregnant. If sperm is deposited in the vagina then pregnancy is possible.