Positive thinking plays a big part in determining whether you will be successful and this is how I’d chart their relation:
The more positive you are the more likely your are to succeed.
I came across a graph from one of my newspaper clippings collection and promptly pin it up because I like how it outlines another key factor — success is not only determined by the kind of attitude you have but also by how bad you want it (which is to be followed by a plan of action).
Through purely unscientific inference, I conclude that if we solely depend on positivity, we’ll likely fall into the “I think I might” to “I think I can” spectrum. Therefore, to increase our chances of success, we’ll need to rise to the next level. When you’re at “I can” or “I will”, a natural question that follows will be, “How can I make this work?” and you will be on your way to writing you own blueprint to success.
Of course, there are other factors that would influence your chance of success – connections, luck, fate, cats (having too many cats greatly reduce my chances of a spontaneous getaway — who’s gonna feed all the cats?!) — but as they say, success is 99% perspiration, so get sweating and good luck!