Came across this great slide deck. This is precisely what you need to do to validate your idea.

Never take decisions with your intuition. Eg. “I feel¬†people will buy this product.”, “Ye chal jayega¬†yar! (this will surely work!)”. As Paul Graham says:

“It’s like skiing for the first time, you first instinct, when you ski, will be wrong.” – do what your head says, not what you feel.

Use this ‘scientific’ process to validate your idea: