Jeremiah Shoaf put a ton of work into assembling this comprehensive single-page overview of most everything you need to know to get the finer points of typography right—including keyboard shortcuts for Mac and Windows, HTML entities, FAQs about when to use certain characters, and even a downloadable, 1-page PDF that you can print out as a handy reference. It’s a wonderful, meticulously prepared resource, and it’s free. Send Jeremiah a note to thank him.

See the full cheat sheet at typewolf.com.