15. Think before you print
These days it seems everything is digital, and that's not always a bad thing. Before you print something, take a cue from Raven and consider other ways to share the information. Cutting down on printing saves paper, which cuts costs and – on a grander scale – helps save trees.
See Hayley Kiyoko as Raven Ramirez and her awesome co-stars on CSI: Cyber, Wednesdays at 10/9c.