By attempting to make optimal entertainment choices. For example, watching a classic film that is in the public domain on archive.org instead of going to see the latest Disney production in the theater and paying $10 for a ticket. Borrow a book from the library. Have friends over for a game night instead of going out for drinks. There is no best solution. My hope is that people will at least try and make better choices.

I agree that most of what people spend their money on is the pursuit of happiness and entertainment. My view is that the path to true happiness does not lie in material goods or personal experiences. Rather, helping others in their struggles and seeing their lives improve leads to fulfillment.