Start by installing a retracting swing-out mirror facing the main bathroom mirror. Get a day, like an easy Sunday, when you have some extra time to commit to the shave. Whip up plenty of lather. Instead of rinsing out the extra lather, wet the back of the neck with a washcloth and use the two mirrors to brush the extra lather onto the back of the neck. As a beginner, use a mild razor and shave WTG and AGT up to the hairline, just like shaving the face below the sideburns. If I get bold, I may move on to barbershop-style trimming with a shavette. I have an inexpensvie Turkish Sedef (Pearl) on the way.