[hallmark]

Just because you have so much leeway, don't be sloppy in your choice of what to do with your free time. [1]

For example, if you're actually considering the pizza delivery scheme, first research the maximal amount of efficiency that you would possibly be able to add to the system. Then decide if it is worth pursuing. This does not apply if you are passionate about delivering pizzas!

[1] Consider deliberate choice to be general advice for those with lots of time and the goal of doing something substantive. Or if you are young, newly graduated, and thinking about jumping into a startup with some friends.