Jeffrey has an article somewhere around here about change jars, and their pros and cons in the days of Coin Star an such. I've always had one and found it to be a small thrill, rolling up all those coins.
I was actually going to post today about saving my one dollar bills. I rarely have cash on hand, but lately I have for various reasons. I've been saving quarters and one dollar bills. I think I already have over $20 saved in ones, and it's probably been about a month that I've done this.
