Here’s one for you: Never drink cheap energy drinks. They will actually make you more tired!
Shiv, Carmon and Ariely performed a study in which participants received either a SoBe ($1.89), a discounted SoBe ($0.89), or nothing at all before making a puzzle test. The results? The regular SoBe did not increase performance with the puzzles. But the discounted SoBe actually reduced performance! The discount provided an actual negative placebo-effect!!
I myself am still drinking cheap energy drinks. Why? Because I know these results. Placebos lose their effect if you know about them. So go ahead and open another can of Golden Power :).