Excellent piece by his former speechwriter here:
Rumsfeld was one of the last of the old-school public servants, who was kind to people in small, quiet ways; who helped a loved one cope with crippling drug addiction while simultaneously managing a war; who was friends with people ranging from the Kennedys to the Cheneys to Sammy Davis, Jr. and could put politics and policies aside to value them as people.
Mr. Rumsfeld was kind enough to join us on Midrats in April 2011.
In this time of demanding instant gratification, it's worth remembering one of his "Rumsfeld Rules"
Strategy doesn’t begin at one point and end at another. It involves planning and evaluation, requiring trade-offs and decisions along the way. It takes work, thought, and time.
His website can be found here.