It is also good to talk to your family and friends who will, I hope, give you an honest assessment of you as you are today. This is not always easy, but at the same time will show courage, humility and integrity. This may, in turn, be guided by what you have achieved in your schooling and early life.
All too quickly those childhood dreams and aspirations ebbed away as the responsibilities of your first mortgage, meeting your partner, marriage, children, a bigger house and simply staying afloat rapidly took centre stage. And before you knew it, there you were, slap bang in the middle of the rat race.
When I stereotype the American startup founders I've met in London, I notice the gene that they seem to share with Penny - that American go-getter "shoot for the moon and even if you miss, you'll land among the stars" mindset. (Somewhere, my British friends are rolling their eyes at that cheesy quote.) Americans don't seem scared of their own idealism, whereas in British culture, I find brazen optimism often equated with stupidity.
What really matters is how the idea is executed. That's what makes the difference. Things like your brand, your marketing, the attention you pay your customers, and crucially - the passion you have for the idea - are what make your proposition unique. Success is built on people, not products or patents.
For many entrepreneurs, launching a business can be the most exciting time. Putting so much effort into your ideas and seeing them take form is a great achievement. However, I have spoken to a lot of startups in the past that feel as though they have reached the finish line by simply getting their business off the ground. In reality, this is when the hard work really begins.