We love this quote! Teach it to them young and they will carry this mindset throughout life. "In this room, we don't do easy. We make easy happen through hard work and learning." Sounds like something Ron Clark would say.
Exit slips, you give students a quick prompt at the end of class (or for elementary, at the end of the day or the end of a subject). Then the students have just a couple minutes to write an answer and turn it in.