If anything, your niche should solve a problem for your target group. Pain points are very important.

If you can figure out what the pain points of your target group are, you can come up with great market niches.

To do this, you can visit several forums related to your interest, passion or brainstorm list.

Read through several discussions and make notes as you go. Note the kind of questions people are asking and what kind of problems they have.

Use Google trend, Yahoo trending, Twitter trending, ebay popular, google suggest, Google keyword planner, Jaaxy and even Flippa (look for niches that sold high) to find keywords related to you niche idea.

This can help you uncover popular search terms related to pain points.

If the niche you are leaning toward is consumer related or e-commerce related, you can use a platform like Amazon for research.