The Paint Quality Institute has many excellent videos and online resources. The PQI conducts independent testing on paint and educates commercial and resident consumers.
Articles on Paint and Painting Projects (sprayers, decks, solvents, etc.) http://www.paintquality.com/homeowners/paint-advice/info-sheets.html
The Painting Essentials: Prep, Prime and Paint for interior and exterior surfaces (wood, plaster, dry wall, tile, brick, fiber cement, etc.) http://www.paintquality.com/homeowners/paint-advice/prep-prime-paint.html
Videos on the Basics of Painting (power washing, paint performance, preparing masonry, etc.) http://www.paintquality.com/homeowners/paint-advice/videos.html
Paint Color and Design Videos for Your Home Painting Projects (psychology of colors, spatial effects, etc.) http://www.paintquality.com/homeowners/paint-design/videos.html
Paint quality (ingredients, painting metal surfaces, etc.) http://www.paintquality.com/media-center/paint-publications/education/index.html
Free newsletter from the The Paint Quality Institute http://www.paintquality.com/homeowners/newsletter/index.html
The Paint Quality Institute (PQI) was founded in 1989 in Philadelphia with the initial goal of educating consumers, contractors and retailers on the advantages of using the highest quality paints and coatings. Today, PQI also delivers information on cutting-edge trends such as color, decorative techniques, and innovative new ways to use paint.