"Kind Words are the start of a Kind World"
Write 20 little notes of kindness put them in stores, restaurants and other buildings where people can find them (Don't put more than two notes in a building). Each note can be the same or different, whatever you want. It can be as simple as "You Rock!" or you can throw in a quote or a doodle. Whatever you think would bring someone a smile. Don't sign the note, just leave it anonymous.
Spreading positivity is a simple thing but can really make someone's day. If you don't feel like writing notes try giving 20 different people compliments, you could try telling 20 different people a joke, or you could smile at 20 different people. Little things like these can make a big impact on someone's day, week. month, year, maybe even life.