1. You can feel bones you couldn't feel before--your wrists, clavicle, ribs, hip bones.
2. Ditto for muscles--you can actually feel the muscle when you flex it, instead of goosh.
3. Your belly button is shallower than it used to be.
Of course, there are the obvious...clothes fit better, you have fewer chins, people say things like, "Oh my GAWD! You're SHRINKING!"
Much better measures than that silly old scale! Even if mine does seem to be saying I've lost another pound...