Here are a few of the challenges that life might toss into the path of a fledgling business.

1. Bad Economy. No matter how tough the economy gets, people still need to eat, drink and live; which means there are always opportunities to serve. If you believe in the old adage of "buy-low-sell-high" the depths of an economic dip should be the best time to start a business. When the economy gets ugly, entrepreneurs get unreasonable.

2. Lack of money. It's hard to stay enthusiastic about starting a business while struggling to pay for food, shelter and clothing. Yet owning a successful business is the best way to get beyond basic survival worries. If poverty is holding you back, perhaps you just need to get unreasonable and start your business anyway.

3. Raising a family. The first few years of childrearing will seriously reduce the amount of time and energy available for building a business. Recently I visited an amazing home-based retail store, owned by a mother of two pre-school children. The mother built the business while managing two pregnancies and raising two infants. That's just plain unreasonable, yet she did it anyway.

4. Divorce. There's nothing quite like a prolonged marital breakup to throw a kink into a business plan. It'll drain your time and nuke your bank account. Yet, entrepreneurs will usually find ways to redirect some energy toward starting a business.

5. Burnout. This is the most deceptive roadblock of all, because it quietly erodes our ability to reason. Like slowly boiled frogs, we are unaware of the problem until it's too late and we're cooked. If life and work are wearing you to a frazzle, you may have to get unreasonable to make the needed changes to your environment.

6. Self-limiting beliefs. Do you hold yourself back with limiting or negative thoughts? Something within the entrepreneur enables her to keep her eyes on the prize, and to focus on the business no matter what obstacles block the path. Absolutely unreasonable.

7. Good Economy. When faced with the perceived uncertainty of owning a business, a lot of rational people will opt instead for a job - which creates the illusion of security... until it comes to an end. Yet some businesses are best started when the economy is booming. Or is that just unreasonable?

If you wait for government to solve your problems, or for the economic stars to line up perfectly, or to win the lottery, or for life to remove all barriers from your path - you likely never will start that dream business.

Businesses thrive not because entrepreneurs have perfect lives, but because they choose to build their enterprises while wading chest deep in the river of life.

You can start your business today wherever you are, with whatever you have, right now. It might be a matter of choosing to be unreasonable and simply getting on with your plan.