Here's the 22st (and final) entry in my alphabetical series of pet peeves--from the X, Y and Z sections of Garbl's Editorial Style Manual. My style manual covers editorial issues like abbreviations, addresses, capitalization, English grammar, Internet terminology, numbers, plurals, possessives, punctuation, spelling and word usage. It focuses on U.S. standards for spelling, punctuation, definitions, usage, style and grammar.
yet Like the conjunctions and, but and so, yet is a useful, correct transition word at the beginning of sentences--instead of regardless and in spite of. For emphasis, yet may be followed by a comma.
Also, always use a plural verb with you, even when you is singular, referring to only one person: Nate, I know you are sick. You alone have understood. You both are busy. See Myths and Superstitions of Writing.