The closing section of the article features tips from recognized productivity experts such as David Allen, who happens to be a long-time passionate champion of Lotus Notes and eProductivity.
The article had this to say:
Allen is a Lotus Notes enthusiast, through and through, but he enhances the spartan Notes interface with the eProductivity add-on, which adds next-generation features to the software. One of these features, for example, enables the user to drag an e-mail message to a "call" button in order to place an immediate phone call to the person who sent the message.
David Allen also mentioned ActiveWords (which integrates seamlessly with eProductivity) and MindManager as being among his favorite tools.
Hat tip to Ed Brill.