Don't just think big, also aim big. Dream big. Have a big audacious goal. A goal that lies outside the circle of your capability. A goal that you are not 100% sure you can achieve but will give your best attempt at, nonetheless. A goal that is like nothing you've ever done before and comparable to the most daring goals you've come across.
Fulfillment in life comes only as a result of attempting and achieving a great goal. It doesn't come by living an average life or attempting only the things you are sure of achieving. Even if you list the ten most memorable moments of your life, chances are that they would all be the moments you achieved something you never thought you would. I will never forget passing both WAEC (with great result) and NECO (with all distinctions) before I clocked 14. I didn't finish my SS2 and completely skipped SS3. (Too bad JAMB wiped off the time gain). Another one is the MVP award I got this year. These were all goals I attempted but wasn't sure I would achieve, and they gave me some of the most memorable moments of my life.
Going through life without some definite goal is like playing a victim of circumstance. And having simple easy goals is depriving yourself of the best you can achieve and the positive motivation that comes from aiming high. Like everyone, you will experience ups and downs but when you have a big goal you are focused on achieving, you more easily recover from the downs and get back into the life race as you know the goal you are after is worth more than all the troubles you face. Having a bug audacious goal gives you a positive mindset, makes you resilient and puts you on a path of steady growth.
Right now, my big audacious goal is web app development. It's almost like changing careers. I want to be able to create the online versions of my Excel dashboards and build the stock analysis website I have always dreamed off. My focus is on providing business data analysis solutions you can use right from your phone, iPad and laptop without having to install Excel. And incorporating web-only features. I have begun pursuing the goal and already aware that it will take me a fairly long time. Everyday, I take steps towards achieving the goal. I spend a lot on books and resources that will improve my chances of achieving the goal. I cut back on my Excel jobs to have more time to read the books I have bought and to practice. It's now my biggest daily motivation, knowing that each day brings me closer to its realization. It's my BAG.