In addition to letter spacing and line height, the number of characters per line is also important because a long line of text produces fatigue and a short line of text can be distracting. 75 characters per line, including spaces, is usually the maximum for a block of text with 5o-60 being the optimum range. [...]
Great Tools & Resources
Stuff you can use — tools, resources, and references — that you probably can’t do without. This list is mostly for me so I don’t forget and go looking again but if I need it, I recommend it.

