Ironically, I use Hashnode to keep myself up to date with the latest and greatest technologies in software development. Reading through links and stories published on Hashnode I gain a lot of useful information about what fellow developers are using and what technologies are getting more attention. Communicating with developers from all over the world gives you a realistic view at the current state of software development.
Aside from Hashnode, I also check Github Trending regularly to see what other developers are interested in.