Startups can only be great at one thing — if we're even that lucky.

One of the greatest challenges in our early days is that our ideas for new features and strategies far outweighs not only our resources but the amount of progress we've made on our core product itself. We'll sit in strategy sessions saying, "Oh boy! What if we added this feature, or went down this path! Now that would be incredible!" without realizing our big ideas are actually going to be the death of us.

What we fail to understand is that great companies are built by maintaining a razor-sharp focus on their core product with an unrelenting drive to be the absolute best at that one thing, at the expense of all other distractions. Great Founders have the ability to never lo...