This is something I've been meaning to add to the site for quite a long time. In the Navigation menu on the left side of the screen, you'll find a new News Categories link. Click on that and you'll see a list of all terms used to categories posts on this site. Click on any term and you'll see a list of all posts in that category. This provides and easy way to, for example, see posts relating to all of my software projects or tips and tricks.
It's also possible to grab RSS feeds for specific categories. For example, if you're only interested in posts about software updates, browse to the Software category, then select the RSS feed icon provided through that page.
Please report any problems in the comments. Thanks.