James Clear schrijft in z’n nieuwsbrief over het verschil tussen amateurs en professionals. Professionals richten zich op het echte werk, en niet op de marginale verbeteringen:

It’s easier to waste time debating the last 10% of improvement than it is to just do the thing that makes 90% of the difference. It’s easier to claim that you need a better diet plan or a new workout template or different gear than it is to admit that what you really need is to not miss a workout for the next six months.