Next time you're out to eat at any fine establishment offering drinks in small, medium, large (and possibly other) sizes, order the small.
I took myself to Panda Express for lunch today and, when asked what size soda I'd like, I looked at the range of mammoth drinks and chose the small. I was surprised to find how big a small is. I mean, my cannine, I wasn't there to fulfill every last desire for soda I could possibly have! It's just to accompany my meal, and this thing was a quart - easy!
So, from now one, I'm going to stick with the small and I'd like to encourage you to do the same. Heck, stay away from the soda completely if you can - it's fulla crap! (I had tea.)
Now, if I could just switch to small ice creams...