One little trick I learned in my first weeks after banding was this. Get a bunch of bananas, peel them, cut in big chunks and put in a container in the freezer. Then use the chunks like you would ice cubes in your shakes. The frozen bananas make the shakes more filling and cold at the same time.
I also did this because I was getting leg cramps after surgery and bananas always seem to deal with that for me so it was the obvious choice.
I also ended up buying some Fiber powder because since surgery I only seem to have a bowel movement every four or five days (sorry if TMI). The thing I discovered is that the fiber powder is quite filling. It is even a tasty if you add a sugar free syrup like the ones made by www.davinvigourmet.com (these are really good, I recommend them).
I ate lots of instant Knorr Hot and Sour Soup. Because you stir an egg into it the soup is quite filling and the bits are all small enough to eat in your liquids and smushy-food period.
All these little tricks can work on the pre-band diet you are on.