The ability within yourself. You can learn the fundamentals and how to hold a pen, but if you haven’t got it within you, education won’t help. You can be self-taught and match the very best, but you have to do the most important thing … practice. Everyday! Your best bet, is to study other designers in the field of your choice. If you are interested in graphic design element of video games, then study the designers in this area and watch their tips and tricks. A while back an art student was interested in how I did my paintings. I showed him a technique with the paints that in all his time at art college, he had never been shown, yet at that moment I had opened up a whole new doorway for him to experiment. If you’re serious in what you do, you will always be learning and looking at new techniques.