How do I become more educated re hyphenation?

I understand all the basics like T-shirt, self-reliance, know-how; but I'm having trouble with the double adjectives modifying the noun.

I once was told in school that right-hand lane was not hyphenated, which screwed with my head because that seems to me to be the quintessential example, two adjectives in front of a noun that wouldn't make sense without each other. I know many reporters hyphenate it, but I'm more interested in what is gramatically correct. Is right-hand lane hyphenated?

I am hyphenating things like low-back pain.  Is that wrong?

Right now my transcript is saying tramatically-induced injury.  Because of the -ly, does that make it wrong to hyphenate?

I do have One Word, Two Word, Hyphenated, which helps a lot. Planning on entering the whole book in my dx one day.

Thanks in advance.

-Clay

Morson's English Guide has a chapter on hyphens which explains them really well.  This is one of the excerpts from the book:

"Here is further proof...Remove the participle from the phrase. If the phrase does not make sense, do not use the hyphen." Example:

carefully devised scenario
centrally located building

Take the participle out and you're left with this:

carefully scenario
centrally building

No sense, no hyphen!!

friendly-appearing witness (do the test and you're left with: friendly witness)
lovely-lined face (lovely face)

yes sense, yes hyphen. :) ...Silly but it works.

The best explanation I have found was through Peggy Armstrong's "The Proofreading Manual."  I purchased it through the NCRA Online Store.

If you'd like more information, feel free to contact me through drscoping@gmail.com.

I train scopists and completely understand how confusing some aspects of punctuation can be.  Feel free to check out my website of www.joyfulscoping.com to find out more.

Sincerely,
Ms. Devon Roberts
www.joyfulscoping.com
drscoping@gmail.com