If you want to get an alert whenever something new is posted, or if you just want to be able to keep track of what you have and haven't read yet, the easiest way is with a program called an RSS reader.
There are many of them, and I will add a list of them for each type of device.
On iPhone, which I see many people have here, I have read that "Reeder" is a good app to try.
On Android, I've read recommendations for "spaRSS" and "Flym".
If you are using a GNU system, I recommend "Liferea".
There is also a website called "Feedly", which is not too bad.
Once you have the app/program installed and running, find the command to subscribe to a feed, and enter "http://rusrs.com/rss.xml".