My go to switch for beginners is to replace your single use water bottle with a reusable one. My favourite is the metal insulated water bottle you can find at Kmart for $6.75.
Another suggestion is to start using a keep cup for your coffee and/or tea. My favourite are the cups from 7-Eleven because a) they're made from recycled takeaway cups and b) they're awesome at the dog park because when they're closed and another dog knocks over my cup it very rarely spills!
Share your switches below: