Nintendo knows it's difficult to find good courses in Mario Maker — so they're launching a website to help you sort through them. The site will even include a separate section for auto courses. HOORAY.
As you can see in this screenshot, some of your options for browsing will include difficulty, theme, and style. Of course, it would have been better if this were built into the game, but hey. This is something, at least.
We'll let you know more about the website/what the actual URL is once Nintendo shares this information. For now, here's the trailer: