Prenatal vitamins before your pregnant

Taylor
My husband and I just started TTC. I've been reading all these articles on how you should get started on prenatal vitamins now, so when you do get pregnant you are getting enough folic acid. 
If this is true...what is the best brand or kind to get? I just don't want to get too many vitamin intake since I'm not pregnant yet...like iron. I just don't want to get certain side effects.