Is good internal linking a way to rank your site higher? I am creating a very large table with about 120 different types of generic, related products on my money. I plan on putting a link in the name to a separate post containing basic information about these products, with amazon links on the table and separate pages. If I put 5-10 internal links to other articles within my own site, would that help my rankings? Also, if I created a type of tier 1 wiki to my site, containing all of the articles I made in the table, would it be okay to include links to my money site on every page? Also, what if I used duplicate content from say wikipedia on those pages? What about forum posts? Are those okay to use? Or would I want to make it all original?