Your own happy

The best thing you can do for the world is to make yourself happy (without bad intentions or malice towards anyone other than yourself). It is not a selfish act to seek what will make you happy and what will keep your happiness first and foremost, be it a career, a lifestyle, a lover, or listening to Kesha once in a while. If you choose decisions with this goal in mind, your outlook will grow positive and your overall moods of happiness will ensure others around you to be happy too - by the process of being around someone chipper about their own life.