I'm writing about hyphens right now for my upcoming AP style webinar, and I always use examples from the fabulous Lisa McLendon, who used to tweet them a lot. (She is @MadamGrammar on Twitter; her book is "The Perfect English Grammar Workbook.") This is one of hers:

A "tiny house fire" is not the same as a "tiny-house fire."

Since hashtags are a big deal here, I'm thinking it might be fun to collect these with a #WhyWeNeedHyphens hashtag. Add yours!

@grammargirl How about this one?

A great-grandfather is not always a great grandfather.

#WhyWeNeedHyphens

@grammargirl So, hyphens are not dashes, granted. But just in case your article should happen to include dashes along with hyphens...

Something I think more typesetters need to do: put non-breaking space before (but not after) dashes (both em and en). That keeps them from ever being the first thing on a line. They can be at the end of a line, but i always found it hinders reading speed and comprehension to have a line begin with a dash.

@grammargirl A lot of hyphen abuse in online writing. Also a lot of confusion between the hyphen and the em-dash