So, why not?
It's just inconvenient, not a habit.
I could take the bus to work more than I do.
So, why don't you?
A little bit of laziness on my part. The weather getting warmer would help a lot with that.
Probably recycle more, honestly. I'm bad about cans — mostly just give them to my roommate, so he takes care of those. So hopefully he's recycling them.
I would say to eat less meat. Meat's the biggest contributor to environmental warming.
Composting more. I do a lot of gardening and often throw away things that I should compost out of sheer laziness.