Shopping Daylindrome*

Spend the first half of your day buying all kinds of items: clothes, electronics, nutritional supplements, that kind of thing. After a break in the middle of the day, go back to the store where you purchased the last thing of the morning (be it the shirt, TV, Stacker-2, whatever it was). During the second half of the day, continue returning things in the reverse of the order you purchased them. At the end, you will have undone everything you did, in a financial sense.

You're at sum zero for the day, which you can only achieve by the method above, or by not getting out of bed.

*Day + Palindrome = Daylindrome