One technique I’ve used to help cut down on coffee is to stop using the Starbucks app. If I do want one, I have to pay full price for it.
“I started using the Starbucks app this month. So far, the major consequence has been that I spend a lot more money on Starbucks, even when I don’t want to. It’s good for Starbucks and bad for me — or any consumer who uses the app to order their drinks before setting foot in one of the chain’s stores.”