How do you successful entrepreneurs come up with your ideas??

I have no problem taking action at all, but it seems I am focusing too much on the business idea to get it going. I realize I have to help others through a service, product, arise emotion, make them feel better and so on which I have completely embedded in my head.

I decided it should be an internet based business preferably with systems so there is no inventory, shipping, and so on as I am currently taking home roughly 18,000 a year.

I was wondering if there was a system you go through to develop your ideas or a certain method. I am constantly thinking throughout the day of problems I have or others have and find it hard to come up with something.

I will admit that as each day passes, I despise the system I work for and so badly desire to run my own company.

So ultimately, how do you come up with your ideas?? do you stumble upon them?? develop them through a process???