This paper says "Family Budget" at the top, followed by the month and year (we print a new one off each month). Then we have sections for each of our expenses. We keep each of our receipts and post these under Groceries (food or non-food); automotive; charitable donations; eating out (dating or family); clothing; miscellaneous; and rent, to name a few. We've changed these sections over the years, and they probably still aren't the best titles, but they mostly work because there is at least a place to post each of our expenses. Beside each title, there is a price limit. These also have to be realistically reviewed occasionally.
Archaic? Yes. Difficult? No. So even for the technologically-overwhelmed or the lazy, there's still a way to keep a budget. Because, as Amber said, it's a useful tool for helping to distinguish between wants and needs.
Finally, a quote (which is at the top of each of our budgets):
"I have discovered that there is no way that you can ever earn more than you can spend. I am convinced that it is not the amount of money an individual earns that brings peace of mind as much as it is having control of his money. Money can be an obedient servant but a harsh taskmaster. Those who structure their standard of living to allow a little surplus control their circumstances. Those who spend a little more than they earn are controlled by their circumstances. They are in bondage." -G. Homer Durham