A Little Less Conversation
As the boss, you need to design ways to reduce communications paths. Eliminate companywide mailing lists -- or at least charge $1.50 to post to them. Stop having large meetings. You need a culture in which people don't get uptight because they weren't included in a meeting, which means you need a culture that rewards people for doing their jobs and frowns on meddling in other people's work.
more on inc.com
Joel Spolsky on overcoming unavoidable cost of growth. Also, a link from the comments, by Scott Berkun: Exceptions to Brook's Law.
