The Principles of Innovation: The Dont's

1. The first is simply not to try to be clever. Innovations have to be handled by ordinary human beings, and if they are to attain any size and importance at all, by morons or near-morons. (...)
2. Don't diversify; don't splinter; don't try to do too many things at once. This is, of course, the corollary to the "do" be focused! (...)
   
3. Finallly, don't try to innovate for the future. Innovate for the present! And innovate may have long-range impact; it may not reach its full maturity until twenty years later. (...)

The Essential Drucker
Peter F. Drucker
Collins Business 2005