All of this!  If weather permits (since it's October) wear a crop top and either something short on the bottom or tight pants/leggings.  Absentmindedly touch your collarbone.  Maybe even carry some kind of small healthy snack in your purse (small serving of nuts or dried fruit, even if you're not intending on eating it) and "accidentally" pull it out while searching for a wallet or something, and gush how you "can't go anywhere without making sure you have something to eat, tee-hee!" <-- I've been doing this at work and have an excuse for it, being 7 mos pregnant and all, and I almost never need the snack unless I decide to eat it as my lunch.  It's funny to see the reactions from the fats when I follow it up with how I'm due in two months and have only gained about 12lbs.