Preconception appointment

Okay ladies, those of you that have been to a preconception appointment, what was it like, what does the ob do, anything else you think I should know? I've been ttc with my husband for almost 10 months with no luck, so I think that I should schedule a preconception appointment because I never had one. I've been on prenatals for almost a year now. I just want to know what I should expect as I think this is the next step for me and my husband. What do you ladies think?