Any advice on how to increase chances of getting pregnant?

I need some advice. My husband and I have been trying to get pregnant for a year now. I'll be honest I haven't done a lot of ovulation tests. I'm 23 years old I didn't think it'd be so hard to get pregnant. I'm active and at a healthy weight. Any advice on what to do? I've done some research and considered using preseed. I'm just getting frustrated and upset because it's not happening. Thank you in advance!