Folks, if you find yourself unsure of what you really are, or in doubt of what you can do in life, then I suggest you read this book by Amar Delon entitled "Have You Found Yourself Yet?"
This book will help you realize the importance of passion in whatever you do, whether it is work or a hobby, and how passion can greatly shape your life. It also tells you that you can attain happiness if you do something to achieve it, and you do it with passion. It also makes you aware that you must have a certain goal or desire, not only a simple one, but a goal with sense.
You can also figure out that in times of happiness, you cherish every minute of it and make the most out of it, but when you're down, there is nowhere else to go but up. Go up and learn from the mistakes that brought you to the bottom. As what he wrote in the book, "Failure is a challenge and every challenge is an opportunity in disguise.", you must look at failure on a bright and positive side.
And yeah, so much for the book because I might spoil the fun inside the covers of the book. If you want to know yourself further, I suggest go grab a copy and read it.