Did you make a cool thing? Show off your work!
Did you just publish a blog post, a preprint, or even (gasp) a peer-reviewed paper? Did you do a webinar, or present something at a conference and the video is available online? Did you write a tutorial or create a new open-source project?
Seriously, go ahead and flaunt it! You’re very welcome to post about it here and share it with the community.