In order to encourage your ambitions to grow, you have to stop setting yourself so many impossible goals! It's not aiming high that gives you a hunger for success -- it's getting a taste of it. So start setting more reasonable, attainable goals. Show yourself that you can accomplish things, and you'll have the confidence to keep pushing yourself harder and harder. Trying to climb the highest mountain when you've never hiked a day in your life isn't ambitious: It's an excuse not to succeed.