Nick,
You are definately on the right track with planning ahead. Now to your issue of motion sickness. I myself was plagued with this problem during my primary training. I had the 7:30am slot at my college, so it was first thing, mind and body aren't entirely functioning as a whole, etc... One thing I did was cut out breakfast. I might eat a pop-tart, but that was it. Another is keep hydrated and on a good sleep schedule. On those really hot days, it will advance the sickness because the body is reacting to the heat. Also anxiety towards new manuevers or uncomfortable feelings, such as the stomach drop during stall training. Over time you should grow accustomed to everything and overcome the sickness. By the time I hit 100hrs I was a completely different person in regards to Motion Sickness. Every year I could tell I was resisting more and more. Now I might get a lil weasy one day a year, and that's flying every day. So keep your head up, keep working through it, and don't let it discourage you, you're body will eventually change and accept the rigors of flight.