In your own space, recommend a fannish or creative resource. Leave a comment in this post saying you did it. Include a link to your post if you feel comfortable doing so.
This falls under the kind of advice that's so obvious it's embarrassing to call it advice, but I keep noticing that some fanfic writers, especially younger ones, don't do it: read books. I mean fiction or nonfiction of any genre, whatever piques your interest, even guilty pleasure novels or ones marketed to children. Practically anything that was written as leisure reading is a resource.
Yes, TV sometimes has better writing than books, but watching it doesn't allow you to absorb the mechanics that make it work. Yes, fanfiction can be of higher quality than published works, but by its nature it leans on a source that someone else wrote. Only books have the whole package, and the more of them you read, the more your own technique improves.
Probably not quite what this challenge was asking for, and I know it makes me sound elitist, but I stand by it. Anything to get people to read more.