One common usage mistake — and a particular obstinacy of the it's - right - because - that's - the - way - I've - always - done - it crowd — is failing to hyphenate phrasal adjectives.
Theodore Bernstein, John Trimble, R.W. Burchfield, Patricia T. O'Conner, and Bill Walsh also advise following a bright - line rule for hyphenating most phrasal adjectives because, as Garner summarizes, the hyphens make reading faster and easier: