If you're tired of going to every single group and project to which you've subscribed to see if there is a new post, you can subscribe to the groups and projects instead.

Look for the feed icon at the bottom of the page -- it's bright orange and hard to miss!

When you click on this icon, you'll be taken to a page like the group/project page except it has subscription information on the top. Copy the URL of this page and paste it into your favorite RSS reader. Viola! You've subscribed to that group's/project's feed. Now, instead of going to every single page, just go to your RSS reader and all of the new posts will be delivered to you.