1. Names must be priced realistically
2. Adult names typically do not sell if they do not have traffic.
3. List them at Afternic.com with 'expanded promotion'
4. Names must be good
5. Names must be good!
It took me 5 months before I sold my first domain. Now I usually receive 3-5 offers a week between Sedo and Afternic. But I also have a significant inventory of names.
If you just registered some names 2 months ago that you thought might be good, you'll have to wonder why they have not been registered already. The best way to get some decent inventory when you start out is to get them from drop services TDNAM, Enom, Pool, Snapnames. These day's there are not very many new registrations that are worth much unless they have to do with a new technology,term, or product.
good luck