Kevin has posted about the Parallel class and how to use it to easily do multiple operations at once without radically changing the structure of your code. Very neat stuff.
David has posted about the Agile Retrospectives book and his experiences. Incremental change is fundamental to so many agile practices (probably the most important in my opinion) – and retrospectives are the best way to foster discussion and prompt change. The problem is how to get everyone involved in the process.