What would it take for me to get you to do something? Well, you’re thinking, it would depend on what that something is. OK, let’s say I wanted you to:

Drink a glass of tomato juice

Run 3 miles in flip flops

Clean out the garage

Give up coffee for a month

Lose 10 pounds

Play Bach's Cello Suite No. 1 (on an actual cello)

Swim the English channel

Those happen to be in the order I would rank those behaviors, from easiest to hardest. You'd probably rank those behaviors differently. Go ahead, rank them in your mind.

Now consider what somebody would have to give you in order for you to do each thing.