Oh man I love the typesetting too, finding just the right font is A+. This is ASH's How To Make A Book gdoc, it's specific to pulling fic from AO3, but it has some excellent general tips for typesetting in Microsoft Word (and I think it also has links to tutorials for other software). I probably use Adobe Garamond Pro and Adobe Jenson Pro most often, though I've been using Crimson Text a lot, lately.