You can put it in your gas tank, buy coffee/tea, purchase lunch for a few days (depending where and what you eat), shoes, make-up, magazines, a book, toilet paper...etc!
If you had $20.00 less then your monthly budget, would it really hurt you? I know for a struggling seminary family, $20.00 is like $100.00 to us. We make it stretch big time. This is a choice we have made for our family for this short time in our lives while the Mr. is in seminary.
When given the opportunity to give, we will, and we have.
Where could you put $20.00? Try a non-profit of your choice. A cause or organization that inspires you, that speaks to your heart. That $20.00 will make all the difference, I promise you.
Blessings be with you...