keep it in your pocket/kneepad to hand ALWAYS, marked with the latest winds etc
Not sure I would go with this, unless you have autopilot the wizzwheel is hard to use while you are flying, what you DO want is a big wind arrow on the chart with Max drift written besides it, you then need to know the mental tricks to apply this to your track and TAS to get heading and GS, this can also be used to cross check that the answer you have from the wizzwheel is correct (and in the exam it might tell you which of two answers to go for).