Across all platforms (not just Reddit), people including myself like to save/bookmark interesting content in the hopes of getting some use out of it later. The problem arises when you start accumulating too much content and forget to ever check that stuff out.
I'm working on a solution to help resurface Redditors' saved things using personalized newsletters. I'm calling it Unearth and users get to choose how frequently they want to receive their newsletter (daily, weekly, or monthly). The emails contain five of their saved comments or things and link directly to Reddit so that when viewing it, they can then decide whether or not to unsave it.
Basic functionality is all there, just needs some more styling and the landing page could be spruced up.