“To improve is to change; to be perfect is to change often” – Winston Churchill

The most critical decision for an entrepreneur is to know when to stay the course vs. change direction. I’ve spoke at length about how to deal with “The Entrepreneur’s Dilemma.” Today we launched the new version of Docstoc that completes our 6 year evolution from a professional document sharing website to the go-to resource to start and grow small businesses. In part we were inspired by some of the most famous business pivots of some of the most famous brands. Here are fourteen extraordinary examples:

1. Twitter

• The most legendary pivot in social media history is the transformation of Odeo into Twitter. Odeo began as a network where people could find and subscribe to podcasts, but the founders feared the company’s demise when iTunes began taking over the podcast niche. After giving the employees two weeks to come up with new ideas, the company decided to make a drastic change and run with the idea of a status-updating micro-blogging platform conceived by Jack Dorsey and Biz Stone.

Click here for the rest of list at Forbes