'You must swing smoothly to play golf well and you must be relaxed to swing smoothly'
Bobby Jones (quoted in the Cosmic Laws of Golf by Printer Bowles)
If you're tense you won't play good golf. It's a scientific impossibility and nothing will get you tense like the 'naughty golfer' will.
Learn good relaxation exercises off the course and this will help you develop effective and instant relaxation techniques on the course, just when you need them the most - for your golf swing.