The Lost Links tab has the same interface as the New Links report does. For your own domain you might want to consider tracking your own links in something like Raven or Buzzstream but this tool does report dropped links down to the day. Combine that with their crawling preferences (better links = quicker attention) and you can spot drops of substance quickly.
A few years back we decided to move our community forum from a different URL (myforum.com) to our main URL (mywebsite.com/forum), thinking all the community content could only help drive additional traffic to our website. We have 8930 site links currently, which probably 8800 are forum content or blog content. Should we move our forum back to a different URL?
Competitor Backlink Audit: Analyze the link profile of your competitors and look for opportunities that can help improve your own link building and search performance. Whenever you perform a competitor backlink check or audit, you must also check the inbound links that are pointing to top ranking pages so you wouldn’t miss out on important link opportunities.