Go test drive a car that is nicer than yours. Have a coffee in an opulent hotel restaurant. Find a great deal on the least expensive night of the year and stay in a nicer hotel than you usually would. Rent a slightly nicer rental car than normal.
Go shopping in more expensive stores during their sales. Pick one item you love, that is at an affordable price for you, and buy it.
As you slowly upgrade your experiences and surroundings, it will change the way you think, feel and experience or see the world.
Even if you don’t choose to upgrade permanently, due to budget or other considerations, treat yourself to it once a month or 4 times a year at least.
You’ll appreciate the differences.