In one study, people who were instructed to think about money before entering a cafe spent less time chatting with the other patrons and more time working.
For example, all week you have been hanging out with and talking to someone called John and you want to say: " Uh! No more John! That's too much John! I don't want to talk to John anymore! "
Well, the last time you made an unscheduled video-chat, there was a curly fry in your regular fries and you thought someone might be trying to slip you a mickey.