If you don't have an about you page, consider adding it or updating. Depending on how the feature is ( a name drop with photo and link?, and interview) people may be interested in learning more about you or your process!
Definitely star your featured item so it's at the top of your shop. Make sure everything is well organized, and nicely arranged. Multiple quantities is a good idea.
You might want to calculate processing time for levels or orders, so you can post a huge caps announcement about processing times if you are going to make them as the orders come in. That way if you hit X orders, you can alert buyers to it maybe taking a bit longer to get to them...
Good luck! Hope its goes well!