Especially if you're an overthinker, give yourself permission when you go out to be 'dumb' and to simply 'enjoy' everything. Appreciate inane things like the way the music is pumping into your ears or how it feels to stand in your shoes. Start small chat with anyone nearby you about nothing - like their t-shirt or glasses. Stay away from diving into a deep or logical discussion. Analysis is paralysis. Just keep rolling around in that positive, nonthinking state.