It is such an important lesson in life. Prepare yourself for the future. It doesn't mean you can't have things or do stuff. It just means be frugal, take a time out when you want to buy something. Most times you will forget about it. Watch your Bank/Investment account grow. It will make you much happier than the latest gadget or new car, etc. Invest in things that will protect you from inflation or will help you generate a passive income (rental home, Land, etc).
Wealth buys Freedom and will protect you in times of harm. I always try and tell people that less is more, save your money.