1.When seperating phrases that don't need to be there.
ex: My pencil ,George, is broken.
2.When linking two independent clauses with a conjunction.
ex: I want to play, but I have homework.
3.When you're addressing someone in particular.
ex: Let's shop, Grandma.
4.When making a list.
ex: I spy a sandwich, a duck, and a kid.
5.When you have more than one adjective modifying a noun.
ex: The beautiful, amazing Waddles.
6.After introductory phrases or clauses.
ex: Once we're done with this level, we'll move on to the next one.
7.Dates ( Not the love kind )
ex: November 12th, 2014
8.The end of a letter.
ex: I miss you Grandma