http://painterskeys.com/ At the top go to clickbacks then you can browse topics by year. In 2012 I found the "How-to-purge" and "Pomodoro" particularly interesting.
"The Painter's Keys is the online extension of Robert Genn's Twice-Weekly Letter. Creative folks from more than 115 countries visit this website for information, inspiration, artist advice, friendship and connectivity. Informed and successful painters and other artists make their own contribution through the Twice-Weekly responses or clickbacks. It has also been our goal to make this website an online resource of information for artists and a place to share with others what you are doing, such as through the Art Show Calendar, Art Workshop Calendar and Premium Art Listings. One of the most popular pages is the Art Quotes page, and we also share other things like a listing of Art Retreats available to artists, books, videos, and more.his website also has a Resource of Artist Quotation, an Art Online Directory" from Robert Genn