If there is one thing I would advise you to do is to read, research and come up with ways to making this world a better place. Now, you may not influence a million or a billion people but if you do change the lives to say 100 or 1,000 people then you are doing amazingly well! However, you cannot do any of this unless you work on yourself first. It is super important that you recharge all your batteries before setting out in the world. One of my favourite book is the The Four Hour Work Week by Timothy Ferriss. It's a good starting point to free your self from unnecessary time wastage and become more productive, instead of just being busy.
The other books I recommend are below. When I was at university, I listened to 'How to win friends and influence people.' From that moment on, I know that I would not finish my degree. I had a few subjects to go, however it was not my calling to finish that degree off. I didn't see myself communing to work, struggling in life and being unhappy. Just like I had invited Facebook to connect everyone in the world, I knew that I had to let out all my other inventions and business ideas out into the world. I enjoy helping people and making he world into a better place. I am a creative person and I am always looking for ways to improve the world, make a difference, prevent problem, solve problems and improve what already exist.
If you need any more inspiration and help, you can always reach out to an awesome mentor, marketer and all round cool guy Tai Lopez. Your purpose in life is calling you. Answer that call and go with it. Everything else will fall into place.