Drawing some letters is a great way to warm up your creative and visual thinking skills. That's what all these lowercase B's are about! I set a timer for a few minutes and drew as many different lowercase B's as I could in that time.
Setting a short time frame keeps you going. There's no time to evaluate what you just did. So you don't. You just keep coming up with ideas. There's plenty of time to evaluate things once you're done. The same is true whether you're drawing lowercase B's or thinking up ways to save the world.