" "

Make sure foot and inch marks are straight, not curly.

Use bold or italic as little as possible, and not together.

Never Underline

Never underline, except perhaps for web links.

Underlining is another dreary typewriter habit. Typewriters had no bold or italic styling. So the only way to emphasize text was to back up the carriage and type underscores beneath the text. It was a workaround for shortcomings in typewriter technology.

All Caps

All caps are fine for less than one line of text.

PICATUS SINCIISSUM AUT LIQUISSUNT AD QUASSUS SIMPOREPE PORECUM LAM,

Don’t

Picatus sinciissum aut liquissunt ad quassus simporepe porecum lam,

If you don’t have real small caps, don’t use them at all.