How do I fnd the next killer idea ?

"I want to develop a site" a friend of mine confessed to me.
"That's Great" I said.
"But I do not know what should be the area in which I should develop"
"Oh ..." I said
"I was thinking of some killer idea , but could come up with none. Do you have any such idea "
"If I would have such idea , why should I give you it you " I smiled and said .
"Yeah .."

All of us try to find some killer idea. What could be that next application which could be google or facebook.
Unfortunately most of us do not find any such idea.
Some people take the same idea and customize it according to a region.
I have seen lot of people doing that in India and in some cases that seems to have worked well.

There is no point spending years in finding that killer idea. My perspective is that find something which exists and see if you can provide a better service at lower cost.

You may end changing your business model or tweaking but it is fine as long as it generates revenue.

I have developed geekevaluation while I was thinking about assessment solutions and realized that there is scope of improvement in the existing products.

The biggest drawback in the existing sites was that they did not allow mix and match of various topics. In technical world it is very difficult to judge a candidate on one topic.

The skills are a combination of multiple subjects and he or she should be evaluated on all of the topics

I will write more on this later..