Frustration of seating at home

So I left my job after only 7 months and my current status is unemployed. Honestly, I think I made a mistake by leaving the job because I did not had another job at the other end. If you want to quit your work then make sure you have better opportunity and a job in hand when you leave.
These days I am preparing for exams as in State Bank of India, India Engineering Services, Graduate Aptitude Test in Engineering. So overall it is very frustrating and sadness of seating at home and the thought of wasting the time of your youth doing absolutely nothing.
Seriously, someone give me a 9 to 5 job.

Hi

Hey guys,
I have decided to quit my job after 7 months. It was more of a forced to resign issue rather than quitting it by myself. Being in R&D department for 6 months, factory manager decided to put me as a machine operator because he thinks I was just doing time pass in R&D(Research and Development). Honestly, I am thankful to him to make my decision easier to quit my job. There was no future in the industry either since people who  are working there for 10-12 years have very low wages. Secondly, there is no motivation in doing service for a private industry so I have decided to not to do any service for any private company in future.
I am still searching for what I like to do and I haven't found anything from which I can make something for living. I mean, I like gaming, music, facebook but those are not helpful. There is another option of teaching but the more I think about it, more I feel like not doing it. Remember when we were kids and how we used to harass our teachers? That's what I don't like about teaching.
My another option is opening up my own business. But that would be like what I am supposed to do? Ok now I know what to do but how do I do it? Its a very complicated book to understand. Perhaps at least I will retain my moral to do something special in the future.