There's a lot of talk and writing going on about "small". Here's a partial list:
Seth Godin's new book, Small Is The New Big
Tom Peters' "Wallop Wal*Mart16" presentation
Michael Shuman's The Small-Mart Revolution: How Local Businesses Are Beating the Global Competition.
Bo Burlingham's Small Giants: Companies that Choose to Be Great Instead of Big
And, yes, even I wrote about it in my manifesto, Vanished.
So, a lot of smart people (even if you don't include me) are telling you to stop worrying about how big you're going to get, and refocus on how to act small...even if you're already big.
I further the theme with this idea...you've got to be fast. In fact, it's one of the greatest advantages of being small...and I think the primary reason small companies do so much better. Being fast means you can adapt to change quickly, improvise on a dime and simply outflank the big guys. Being fast means you can change an idea, a product or service to meet the desires of your customer...while you still have their attention. If you're slow, they're long gone before you figure it out...if you ever get it at all.
If you have a big company, break it down into small, manageable pieces...and get out of the way. If you're small, try to stay that way.