To setup my eBook directly with Amazon and never use a third party aggregator/distributor.
To consider offering a hardcover edition. Newsflash: Many institutions (i.e. libraries) are not concerned with the price of your book (like consumers are), and would happily pay extra for your hardcover format.
Marketing
Marketing is an effort, sales a result. While you can control the effort, you can't control the result.
To not spend money on marketing my book until it has positive reviews.
To make my book available in both print & eBook before spending any significant money marketing it online.