People don't like change so incremental changes to existing design are best. But sometimes a complete overhaul is warranted.
How To Persuade Your Users, Boss or Clients
Great tips for any profession.
Google's Marissa Mayer Assaults Designers With Data
Love Google but as a designer I would not want to work there. Lots of great designs were done without a ton of data to back them up.
The Six "Wow" Features of Windows 7
I'm glad to hear Microsoft is took more of a design approach but this Mac snob will not be silenced.
Good IXDers borrow, great ones steal...
Excellent summary of various disciplines that we should steal from.