Let's take inspiration from the people who can afford to go nuts at the mall but don't.
Don't spend more than you have, and ideally spend a good deal less. This is basic advice that we humans tend to have a fairly hard time following. Surely, if someone who can afford a new Bentley every month can go to the grocery store and walk past the sale wine then someone who will never be able to afford a Bentley in their life can, too. That is what I'm going to tell myself.
Living on a dollar a day sounds kind of like a fun challenge. Imagine how much you could save even if you could only pull it off for one month. But let's be real, when I'm worth over a billion dollars I'm not even going to look at anything that's not plated gold and lying on a bed of caviar. And screw having only two pairs of shoes.
If you're looking for tips to save money that are more relevant to your non-millionaire life, check out our Nine Steps for Saving Money at University infographic.