Have you tried those Special K popped chips? They're yummo.
Do you like the Pointless Soup on WW? I make a version of it myself. If you want a protein kick, add some beans or put a bit of cheese on top (that will obviously end the no-point part).
A hard-boiled egg could be a good snack.
Ditto the extra variety of veggies: baby bell peppers, cucumber spears/slices, radish, jicima, etc. You could also make yourself a wrap using veggies and lettuce cups or large leaves (collard greens or something).
I agree with the suggestion of nuts (an excellent dip can be made of pine nuts, lemon juice, garlic, and a bit of H2O in the food processor. . . it's sort of like aioli).
Have you tried the carrot flavor shakes? There's a bag of baby carrots with a little packet of seasoning and you shake 'em together. There's a bit of sodium in it, but it's low-cal and fabulously good.