I really like making graphs and charts with the data and seeing how it's tracking over time. I've never had to go to the extent of an actual budget - I see it as very similar to dieting, where for me it's much much easier to aim for good habits overall (with the occasional treats) than to restrict myself to a fixed number. Similarly I don't really save for specific things, I just try not to spend money on things unless I really want them, so that when I do, I have the money for them. A house/car will probably need dedicated savings, but that's pretty far in my future.
edit: ha, I actually wrote that before seeing you made the same analogy later on. that's a little scary