I seem to continually have the problem of my laptop waking up on its own in my backpack. I’m not sure what exactly is the cause, but I’m gonna assume it’s from the screen not staying completely locked/closed. However, I found this OS X command on Andrew Dupont’s blog, which puts OS X into a “safe sleep” mode. This causes OS X to write memory state to a hibernation image at sleep time. Now for me to awaken my Macbook Pro, opening the lid is not enough. Now it takes a press of the power button, and a few more seconds than before, but no more accidental awakening, or half-dead battery upon arriving at my destination.
Now just put your computer to sleep like you normally would. I for one prefer to use the quick keys (cmd + option + eject). Check the man page for more options.
Velocity Labs