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There are no secrets or tricks that will guarantee you high quality links to your website. Amazing backlinks require hard work. This is what forum vagrants do not want to hear. They need a quick fix and it's much more difficult to create something valuable than simply putting a forum signature on a post. That message often falls on deaf ears.
You can improve your SEO rankings by creating quality content and building relationships with other webmasters.
Broken link reporting is a wonderful idea. You are doing the website and webmaster a huge favor by reporting broken hyperlinks. Find relevant websites in your niche. Next, search for your niche to check for broken links.
A second thing you should do is ensure that you have dofollow links.