Just be careful.... Putting the machine to sleep and storing it in your backpack is OK but be aware if the machine should wake while in your backpack (for any reason) it may overheat. Although the machine is designed to shut down if it does overheat, it's not doing it any good....
Regards.
well some1 walking behind you with an apple remote could wake it up and maybe a wake up schedule as well
however I can't remember the last time I actually shut down my MBP, if it's an hour to get to school, leaving it in sleep over night or over the weekend, the comfort of just opening the lid and having it set to go is well worth the small amount of battery life people always throw in my face ... I just like watching people around me staring at the boot sequence
LOL someone likes attention.
I've never had my MB wake up while it was in my messenger bag. I drive my car to school and usually skateboard or bike across campus with my MB in sleep mode. Been doing this for over a year now.