If my limited experience thus far (one month down today!) is any indication, Slybeard isn't kidding -- go SLOW. And allow yourself enough time in the morning to get it done. At least at first, you're gonna need it.
Also, make sure you have a styptic pencil or something similar to stanch the bleeding that WILL occur, especially out of the gate using a razor.
I would personally recommend picking up an electric shaver, too. they don't get it completely smooth, but if you're staying at a friend's or an S.O.'s house, it's a better way to keep up with it without making a mess out of their bathroom.
Good luck!