I would love to try this and I'm 98% sure I could do it!

could you go a whole day without spending anything? Could you go from the time you wake up in the morning until you go to bed at night without grabbing coffee on the way to work, picking up lunch at a restaurant, buying any groceries or gas?

If you think you can do it, take the "No-Spend Day Challenge."

Figure out where it's toughest to "just say no." Feel what it's like to pass up on deals and offers that you get all day. And, see how much more money you'd have at the end of the day if you got your spending under control.

Source: FrugalDad.com