If you use something every single day, the "cost per use" becomes negligible. Buy the best version once so you don't have to buy the cheap version ten times.

Hiring a cleaner, using a meal prep service, or paying for laundry.

A world-class mattress and blackout curtains.

The most precious resource isn't gold; it's minutes. Using money to eliminate "drudgery" is one of the highest returns on investment you can get.

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