Question
I'm asking this because I'm very determined to start a business, but don't have a clear idea on what to do, and by using this approach I could possibly get some investment if I execute in a high-quality manner.
Answer
Look at the Lean Start Up model for good milestones associated with each stage of the start up lifecycle.
That will give you a good framework to operate stay focused, and to communicate with your team/stakeholders/investors on what you are working on, what is going well, and where/why challenges have arisen.