Don Norman at TED Feb 2003 Conference: Three ways design can make you happy
Don Norman: Attractive things work better
The Open University: Designing for pleasures
Patrick W Jordan: Designing pleasurable products.
Some tips on handtool design.
Don Norman on Emotional Design.
Stefan Sagmeister on TED Feb 2004 conference: how design can make you happy and his sequel on what he has learned in design and life in TED Feb 2008.
John Maeda on TED Mar 2007 conference: design and simplicity.
Dan Gilbert asks "Why are we happy/ not happy?" at TED Feb 2004 conference.
Benjamin Wallace on TASTE3 Jul 2008 Conference: Does happiness have a price tag?