I think everyone should be looking at their weight - not for society, but for themselves and their health. I'm not saying one should get on the scales every day, but be mindful of what you eat, when you sleep (how long you sleep for), and make sure you have a routine of some sort to keep fit - whether that means going to the gym, going for a jog/run/walk, or meditating.
I go to a friend's group training session once a week. Apart from that, I do regular night runs (after getting back from uni) and try to get a decent 6-hour sleep every night.