Ttc since 2003

I been ttc since 2003. My periods are finally regular again. I am 36 and hubby is 42. We really want a kid and we have always tracked my ovulation and period dates I am now hoping That we can have that miracle baby. We don't have sex everyday and hubby does ejaculate rather quickly. Any suggestions on best time to have sex now that I am on a normal cycle and what are some tips to help us have the baby we have always wanted