My wife and I are back on a cash allowance for discretionary spending, and it's fantastic. Essentially, we each take out cash on Sunday (the amount is not necessarily important), and that's what we spend on all discretionary expenses. In our case I don't include gas & groceries in our allowance, partly because I think of those as necessaries with their own budget line items, and partly because I have dedicated rewards cards for those particular expenses.
Based on my analysis, our weekly allowance is less than what we were spending on credit card and POS debit card purchases, but doing the cash allowance we each have money left over every week, and we both feel "wealthy." The wife is not quite as into the money thing as I am, but she is enthusiastic about the cash allowance.
Has anyone else had positive experiences doing this? Would anyone else like to join us?