I think what Seth has to say here is what happens to a great number of people however there is also another side.
Sometimes the plan is so big that we never get beyond planning. We see the blog we are going to build to be so great that we keep on planning and nothing begins. We plan it right into the Impossible Dream.
Planning is important so is beginning. Perhaps just getting started and winning those small battles at the outset will give you impetus to try bigger things and then one day you are on you way down a wider highway.
Don't take on the big guys to start with, just start and watch the big guys. One day you just might be there but if not you will have learned a great deal by doing. Some just never do!
Seth's Blog: Don Quijote didn't ship