Life is a single player game.

You play with yourself:

You should force yourself to do something.

You should make yourself happy.

You should punish yourself.

You should motivate yourself.

You should award yourself.

If you are self-motivated, you will not need any piece of external motivation.

If you punish yourself, you will not do anything against your own conscious rules.

You and you alone, responsible for everything that you feel and think.