Add to your Website and More
Do you know what you should do right now?
Take one of the assignments (or a few of them) you have already completed and turn it into a blog post. Then host that blog post on the website you created.
Just a thought, no need to do it if you don't want to.
If you do, tweet a link to the site and DM @HoppersRoppers so we can retweet you!
Register a Domain Name
If you think you're too cool for a .github.io domain name, go check out a domain registrar and think about buying a domain name to use. You can still use Github.io for hosting (I use it for HoppersRoppers.org!)
I recommend NameCheap if you are going to do it.
This is totally unnecessary, but it is interesting and you will learn quite a bit.