Experiment With “Gravity”
Right now, posts get voted on. More votes means the post goes higher. Once it’s reached a set age, it disappears. That’s going to change.
Soon posts will start out in the middle of the page, go up when voted on, then slowly fall back down the page over time.
Think of each post as a hot air balloon with a rip in the top. Every vote gives it more hot air, but over time the rip gets bigger and it takes more and more to keep it up. Inevitably each balloon will sink.

The new system promotes new, voted on news to the top of the page much more effectively than the old one, hopefully giving you more new stuff to read.
To try out the new system, edit your chosen channel (try your Front Page) by clicking on the little wrench and choose “Gravity” from the Sort By menu.
It’s very new, so it’s still being tinkered with.
It’s based on the same rating algorithm Hacker News uses, detailed here.
Once everyone is happy that it’s working and we’ve made it run happily on the server, it will become the default ordering on the Front Page. So, if your Front Page is currently ordered by Most Votes, it’ll switch over to Gravity (not the best name, I know). You can change it back if you don’t like it, and if you’ve set your Front Page to be sorted by anything else, it won’t change.
If you do play around with it, be sure to tell everyone how you get on.