Board Thread:Support Requests - Getting Technical/@comment-5215338-20131022174754

So my primary wiki, the Sonic News Network, is going to hold a big event that I want to "advertise" around the site, so everyone who visits can know it's happening. Well, what appears on every page? The Wikia sidebar!

I know it's possible to create a custom module on the Wikia sidebar; I've seen it before. But how do I implement this on my own wiki? 