backlinks

I have seen many websites that make backlinks for your website by automatic submissions. I know that some are probably not good but are they all bad or are some good to use to help build some extra backlinks?

I have been trying to build some backlinks for my blog and I wanted to know if it is good to try to build them mostly to my home page so it can rank higher or should I build them to different pages and blog posts? What is the best for SEO?

Is there is any methods to retain the old backlinks, as the backlinks keep on diminishing which was created long back?

I was reading some different topics on the forum here after I saw some posts about having internal links for your website. Some of the posts were a couple of years old so I don't know if internal links on your website are good or bad. Does anyone know if internal linking is still good or if it...