Long story short, I now have about 100 domain names that all relate to my 4 main sites. I bought them years ago in hopes of creating multiple entry points with more info on each domain and then pointing to the main sites. Now that this is considered black hat seo, what is the best thing to do with the domain names? I'm really new to this and only now am getting time to get into SEO after trying for years to find the time. Thanks in advance!