I’ve just set up a matrix homeserver - what next?

I’ve just set up a matrix homeserver after the one I was using ran into a few issues. I’m looking forward to setting up some bridges and bringing a few chats into one place, but I also know there’s so much you can do in the way of extensibility and integrations. I’ve had a read around but would love to hear from anyone who’s using matrix for anything neat and nifty!