Filtering Blogger posts
Filtering my blog by a label, in this case 'octel':http://elearningobservations.blogspot.co.uk/search/label/octel
Filtering my blog's RSS feed by a label, again using 'octel' for the example of a label:
http://elearningobservations.blogspot.co.uk/feeds/posts/default/-/octel
Obviously, this will work for any Blogger blog, so you can subscribe to the aspect you're interested in.