Customers at Muni's coffee shop in Lindenhurst are paying it forward, and it all begins with a post-it note. (Credit: CBS2) Bopp has been amazed by the reaction from her customers.

Markers: It may seem like a minor detail, but get real markers. Not pens or pencils. Food: Don't skip meals and make sure to bring snacks for later in the day. And coffee. Lots and lots of coffee.