A nice little PDF to keep in
my your back pocket, courtesy of Erik Spiekermann and the folks at Fontshop. They have lots of fun little tidbits in the “Education” section of the site that are very helpful, which I wanted to save for future reference.
Typo Tips, the abridged version:
 When capitalizing words in text use small caps. WE DON’T WANT TO LOOK LIKE WE ARE SCREECHING. Also, they fit properly in body text.
 Use Em-dashes instead of hyphens, they are your friend [m = —].
 “Proper quotations” good, prime marks bad. [ opt+[, opt+shift+[ ]
 Numbers should be set as old style figures when set in text; they are designed to match the x-heights of letters and have ascenders and descenders to match.
 Ligatures: Use them. Additionally, they are cool-looking.
 Ragged text is almost always better than justified.
 Bullets > Hyphens