Trying for my 1st baby, any advice lady's?

My husband and I are trying to conceive our 1st baby. We have been trying for about 10 months now with no luck. I just turned 28 and my husband is 31. it's becoming frustrating for me, since he had 2 children from a previous relationship and they had no trouble conceiving. In fact they became pregnant after just one time. So for me I feel like I should have been pregnant already. I have seen an OBGYN and she told me to come back in a year, and she feels it's a matter of time. she did not do any hormonal testing or anything, just the regular pap smear, and STI testing. I didn't know if any one had any advice for me that might help me conceive, or at least some words of encouragement. I never thought TTC would be so hard.