I struggle too, with resisting consumerist urges; which have been ingrained in me since birth. But really, they are right. Does purchasing Tom Ford apparel make you happy? It's fine if it does, but what happens if you don't? Nothing at all, actually.
We don't need all the things we're so constantly sold, and recognizing that lifts a weight (or anxiety, if you wanna call it that) from the shoulders. There's freedom in not needing things.
Go outside. It's free and fun.