Like s3ahors3 said, be well and eat well. Take your folic acid pills and avoid anything obviously unhealthy like alcohol and caffeine (both of you, dad's contribution is just as vital!). You could also try using a temperature chart to work out your most fertile time. It took me 18 months to conceive my daughter, but, using a chart, I got pregnant first time with my son! You take your temp each morning before getting up and you'll notice a dip and then a sharp rise as you ovulate. This helps if, like me, you have an irregular cycle. Other friends have gotten pregnant using this method so good luck!