The way you capitalize other words. If it's at the beginning of a sentence it should be capitalized. If it's not then it shouldn't be capitalized.
No they shouldn't be hyphenated.
words are only hyphenated when they have a separate meaning when separated than they do when hyphenated
No it's not hyphenated.
It can be. Some words can be seen both hyphenated and non-hyphenated.
Yes, "know-how" is hyphenated. It is a compound noun that refers to practical knowledge or expertise in a particular area. When used in a sentence, it is typically written with the hyphen to indicate the combined meaning of the two words.
No, the phrase "thank you note" is typically not hyphenated when used in a sentence.
Compound nouns are either separate words (apple juice), or hyphenated words (brother-in-law), or one word (headmaster).
Pre construction - two words not hyphenated.
No. Hyphenated words are not allowed in Scrabble.
in-house - two words, hyphenated.
Well-to-do is a hyphenated word. The direction west-northwest is hyphenated.