Hacker News (news.ycombinator.com) is basically... reddit for nerds.
About three months ago I added it to the list of sites I read when I'm trying to procrastinate. About two months ago HN took the place of most my other tech blogs (TechCrunch, VentureBeat, etc). Last month I started participating in conversations and sharing links. It's addicting.
Tonight, one of my shared posts (https://news.ycombinator.com/item?id=6709791) caught peoples attention. And people started chatting about the article.
Check out the effect on my HN ranking.