*faints*
I don't even think I could make it to 140 if I starved myself (before dying, that is).
Get accustomed to small meal sizes, adjust intake to your activity level (low = less, high = more, but still not too much), and just do more active stuff. I'm semi-stabilized at 170, down from 190 about 2 months ago, but I usually fluctuate wildly, so I could be way off on both of these. Read containers and learn what they consider a serving size, too. Cut soda out entirely, or at least mostly. Avoid things with HFCS.
Don't stock stuff that's bad for you (greasy/sugary/salty/bread/etc). I don't care for most things that are bad for me, so this is easy, but for many it's not quite so easy. Fruits and vegetables should be a major portion of your diet. Personally, I like buying fruits freeze-dried because then they're easier to carry, taste good, and don't go bad as quickly.
One of the many objectives I met by moving was living close enough to places I go that walking is easier and driving seems like a hassle, forcing me to walk further to/from the car, adding stairs to my routes, etc. It's really awesome. On Sunday I literally walked out my door, down the stairs to the ground level, out of the building, and across the street for dinner. Then I walked back. It was cool.