Just been reading this thread and deffo going to get some ryvita or some melba toasts as a low point snack to have with the extra light laughing cow. Are ryvitas and melba toasts about the same size?
When I'm starved I have a 1p WW yoghurt (either the layered one or the dessert style one) and pour it into a bowl and add loads of chopped strawberries. All that for only 1point, really satisfying. I always have an 'emergency' WW cottage pie for 5 p's in freezer too. You can bulk it out with either a free salad or lots of free veggies.
You can have a cheese and onion toastie for only 3 points. Many processed cheese slices are only 1p each and the WW 1p bread. I use the toastie bags from the pound shop.
Just make sure you use free fruit, veg or salad with your meals so you're satisfied.