From the The Magic of Thinking Big:
No one accomplishes more than they set out to accomplish, so make sure you set big goals!
This is painfully true. Ironically, it’s the big goals that might prove easier than the small ones. The big goals also have big rewards. You’ll be motivated to chase them, and you can probably corral other people to help you with them too.
You don’t know how far you might go in this world until you try. Nobody knows. The only thing certain is that you don’t get what you don’t ask for, and if you don’t set your sights high enough, you’re unlikely to make it to the stars.
Set big goals!