The Associated Press Stylebook has a three-quarter page entry on use of hyphens. The AP rules open with this : "Hyphens are joiners. Use them to avoid ambiguity or to form a single idea from two or more words."
And if you think for one minute I'm going into all the permutations ....well!

(For Stylebook read "you'd better follow these rules or else!) Their attitude, not mine. So -ate merrily away!