One life hack I’ve heard about from high-performing leaders and CEOs involves minimizing recurring obligations at work, such as attending weekly meetings—not because such meetings aren’t important, but because every calendar item that requires a time commitment on a frequent basis adds up over time and eventually takes up all your time. The same is true for recurring expenses: it may seem like it’s “just” ten or twenty bucks, but at some point those amounts of money add up to a bigger cost. Some fixed costs are unavoidable, like your mortgage or car payment or taxes, and others are actually fixed costs that could shift to variable, like your Netflix account, subscription boxes, parking fees, booze habits, and magazine purchases. Just because you regularly devote money to these items doesn’t mean you have to, and so this challenge is all about cutting out such expenses within your budget.