Well, day one wasn't so bad. I won't be starting strength training until Wednesday; I just did 50 minutes of cardio today. 35 was on a treadmill, something I hadn't used in quite some time, and my muscles weren't really used to it. Using a machine for the first few times is always a lot tougher; I'm sure that will get easier.
The diet is pretty unpleasant so far, but the worst part will only last a week. Basically, for this week, I'm going to be living on almost entirely protein: meat and protein shakes. I can mix it up a bit with berries in the shakes, and that's about it. No vegetables or other fruits. I'll be sure to let you know if it's making me insane.