When players go out and train on their own, they usually do it at half speed. This kind of training is valuable, but it doesn't prepare you for competition, where you must perform at full throttle. So the trick is to schedule regular sessions of intense practice, while always leaving time to juggle and generally goof around with the ball
I play for the intense challenges that the game on the highest levels present. The whole team enjoys playng exciting soccer for the fans and my part in that makes me feel good about myself. The whole concept of teamwork is what keeps us all going. It's my role to create scoring chances, and to come through for my teammates is extremely satisfying.
Focus on what you know you can do. Know what you're capable of on any given day, and what you can count on. Do the simple things well, and then use the confidence to build up the rest of your game. Learn to differentiate between what is truly important and what can be dealt with at another time.