I made a simple service for myself (http://paperfeed.io) which is a feed of all the new papers in journals I care about. I can "star" papers for reading later. Works extremely well for my habits.
You're welcome to try it (not sure if the signup workflow still works; let me know). I'll be happy to hear your feedback.
Edit: you can upvote papers, and they'll float to the top just like on HN.