TTC for 5 Years

I just need to know what my husband and I can do to improve our chances of conceiving considering that we were told last year it's next to impossible. I have PCOS and his sperm is low and slow. HOW can we improve our chances? I looked into those Stork OTC things but they are apparently faulty and expensive when needing to buy,more than one. Is there something we can do to improve his motility?