Throwing in the Towel vs. Finding Your Strength

Welcome to Week 15 of my adventure of following the Start Up Version of the Grow Your Business Marketing Plan + Calendar.  In my posts, I talk about my voyage down the road of self-employment as a VMA, my achievements and roadblocks along the way, and I include a weekly recap at the end.
My head hurts.  This afternoon, I found myself thinking, working for someone else was so much easier, maybe I should just give this up.  Maybe I should just throw in the towel.
Did I mean it? No… It was just a moment of weakness… a tiny voice yelling from the bottom of a mountain of work.  I didn’t mean it—but boy would it be easier if I did. 
Why would it be easier?  Because self-employment has caused me to take a long, hard look at myself.  It’s forced me to confront my weaknesses, and face them head on.  And to accept that sometimes, no matter how much I fight, I don’t always win. 
But I’m only at Week 15.  I can’t expect to have it all figured out, can I?
Today, I feel like it’s a challenge.  Today, I doubted whether I was cut out for this.  Today, I considered the possibility that my self-discipline wasn’t strong enough for this route of self-employment.  Today, I wished I was back sitting in my corporate office collecting my guaranteed, lofty weekly salary.
Then I remembered that what you want is rarely handed to you on a silver platter.

I ran the New York City Marathon in 2007.  I’m not a runner, and I’m certainly not built like a runner, but I didn’t let that stop me.  I wanted to do it, and I made up my mind.  I pushed myself, and found myself amazed at what I was able to achieve… A rigorous training schedule, 26 miles of running (albeit hysterically crying for the last 6), and a realization that I’m strong enough to do whatever I put my mind to.
This made me feel better.
Where do you find your strength and motivation? What successes can you share?
Week 15 Recap:  This week, my promo piece has stalled.  But I’m not beating myself up.  It just needs a little bit more time…  Anyway, 15 weeks ago, I would have never imagined I’d have accomplished so much. This week, my weaknesses may have won the battle—but I’m going to win the war.