Stop looking for business ideas. Let your passion discover it for you.

Whatever industry, market, niche you're interested in. You can be successful. Any market.

Passionate about social networks? Build the next Facebook, Twitter or Reddit . But, talk to people before you build one.

Firstly, you need to be really passionate about that market

Second, you need to go and hang out with people in that market. What they do, how they do it, what tools they use etc.

If you discovered a new problem in that industry? Build a landing page for your solution and get pre-signups/sales, and then go build the product.

Have no ideas? Study the competition in that market. Notice any gaps or marketing positioning.

Hell! If you're really passionate about this industry, you should start a blog and start capturing emails.

You can make any (validated) product later and sell them.

Passion, is what drives you initially to seek and dig deeper.