First question. Sould we always use commas before words such as "too," "either," etc? I know we don't in the middle of a sentence, but at the beginning or end? Here's an example: "I'm never going to win the lottery, either." Some of these sentences are clear cut, but with commas here and there, sometimes the extra comma is cumbersome. Are these commas always necessary or optional? Second question. Should we surround the word "like" with commas when it's being used in "valley speak"? I have a character who talks like a high school mallrat and uses "like" in her dialog. "Stop being, like, such a nerd." "Shut your mouth before I, like, shut it for you." I've read this word without the commas in similar contexts, but in this case, I see it as an interjection, like "oh" or "you know." Should I surround the word with commas?