If you click on the little bell on the top right of your Constant Contact account you'll reach What's New in Constant Contact. Currently, that's the January release notes.
January Release Notes
I find these release notes useful - they share the latest editor improvements and other fancy stuff. My favorite change recently has been the ability to instantly add someone to a new list depending on what link they click - ie, segmentation.
This is an improvement that keeps growing on me. Let's say a person clicked on the link featured above - that could lead to a new autoresponder email (or series) coming their way. I keep finding new ways to use this - give me a shout if you'd like to discuss this further.

Have a great weekend,

Albert Kaufman

PS - you can also reach the release notes by searching the Constant Contact knowledge base - there you'll find gems like this .