Leave a Book
Most people take the bus, and leaving a book with a Post-It note saying "Enjoy" on your seat as you leave is one way to make someone's day. You could do this on an airplane or even a train, too!
(Note from Lisa/kuhio98 ~ Whenever I have to use the laundromat to wash big items – for some reason, I absolutely hate the laundromat – I always leave old paperbacks there because I remember what it’s like to be bored to tears with nothing to read.)
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