Pre-appointment: shave and stay in the shade
Sure – it's not quite a party, but shaving and staying out of the sun is one of the best ways you can prepare. The laser hair targets pigment, not hair, so it's fine if you want to shave. (The laser also burns any surface hair it meets on the way.) If you've got a tan, even if it's out of the bottle, it can confuse things. So swap your St. Tropez glow for factor 50 in the run-up to your appointment. Life's all about compromise, after all.