I do a fair bit of walking but, to be honest, I've become really lazy since I started my Masters. I'm not eating healthily, I don't go to the gym at all anymore and I take the bus to get across town sometimes, which I never used to do. I tend to just do the bare minimum so my weight doesn't shoot up.
I'll be finished in September though, so after a week of celebrating I'll get myself back under control, hopefully.
When I do go to the gym I tend to stick to cardio.