In your own space, create your own challenge. What’s something you want to see more people doing in fandom? Is there something you’ve tried that you think other people would enjoy if they gave it a go? Dare your friends to try it out, and have fun with it. Leave a comment in this post saying you did it. Include a link to your post if you feel comfortable doing so.
My challenge is this: Read and/or write pairings outside of your norm. So many people go "This is my pairing and it is all I ever read and write," but I've found from experience that pushing the boundaries of your "box" can really expand your horizons and you can find great enjoyment.
So find something that you wouldn't necessarily seek out, or at least don't turn away when it comes your way. Give it a try! Give it a go!