By default when you log onto the site you will see an indicator saying that you are viewing sites you have rated 3 stars or higher:
You will also find (again, you must be logged in) the ability to rate each site as each post from a site is displayed, or in the list of sites. Just hover over the hearts and click to indicate your level of interest in that site. In this example I have rated the Interdependent Web as 5 hearts:
Other sites you might not be as interested in. So those sites you can rate 1 or 2 hearts and they will not appear by default when you visit the site. You can always check back on sites and change their ratings.
In a hurry and only want to see the content you really love? Just click the filter to only show the sites rated as 4 or 5 stars. Log in on your phone, tablet or any device and all your selections come with you.
Hopefully this wil prove to be a quick and easy way to be more selective about the content you follow.