Determine what you can and can’t control. You can control your reactions to temptation — a lack of discipline is the antichrist to economic security. Our society of superabundance makes this difficult. Billions of dollars are spent every year on schemes to manipulate our natural impulses into spending more money, consuming more fat, and believing everyone around us is more successful than we are. The upgrade from economy to premium to business to first class to private jet can seem like an investment in yourself — it’s not. The most powerful forward-looking indicator of your financial security is not how much you earn, but how much you save.