When building a link choose or submit tags wisely so that your single link can display in several pages (e.g. Technology, Software, Designing). That way your link will be crawled from more than one different pages. Sometimes it may happen that your page (where link lies) is not crawled, but the tagged page is crawled because that page is updated frequently and crawling ratio is also high of that page. And those kind of pages are sometimes listed in the backlinks and SERP by SE.