All of what she said above as well as starting taking a regular dose of folic acid, it's a key element to a healthy pregnancy and helping the chances of becoming pregnant. Good luck!
Ps. I completely agree with the "not making sex a chore" statement, I kinda had the same issue with my fiance and I, after a while he even made bitchy comments about how it felt like it was robotic, I didn't even realize that I made it come off that way because I wanted a baby so bad, but like she said too, a baby comes when your body is ready and not a second beforehand, when it's meant to happen, it will, don't stress or obsess! ;)
Don't let sex become a "job" because it will very quickly if having a baby is all you think about. Just try and relax. Have fun and don't stress over becoming pregnant. It will happen when its meant to. Start tracking your cycles. Keep track of how many days are between each of you periods. Most women have a 28 day cycle and they ovulate around day 14. I was on a 30 day cycle and I would ovulate on day 16. As you become more familiar with your body it will become easier to know when your ovulating. Best of luck to you