The following are links to sites and resources that I have found helpful in my own work.
ByThom: I shoot primarily with Nikon equipment and Thom Hogan's web site is the place I go for Nikon camera and lens evaluations, thoughts on industry trends, etc.
Luminous Landscape: The forums at the Luminous Landscape web site are where I go when I have questions about printing, color management, and other technical areas of photography.
Audible Mount Diablo: Joan Hamilton's collection of "Audible Guides" for Mount Diablo - multimedia tours of special places on and around our mountain.
Stephen Joseph: If you are looking for big, beautiful prints of Mount Diablo, particularly panoramas, you need to see Stephen's work.
These are vendors, manufacturers, and suppliers whose products and services I actually use on a regular basis.
B&H Photo: I have been purchasing photo supplies and equipment from B&H for at least 25 years and have always been satisfied with their service.
Frame Destination: When I need to frame a print, I purchase frame kits from Frame Destination. They use the same archival materials that I used when I was cutting my own mats. Now I let them do the hard work.
KEH Camera: KEH is where I usually buy and sell camera gear. Selling gear to KEH is pretty much no-hassle. Their valuations are fair in my experience.
Lens Rentals: Renting photo equipment is a cost-effective way to access exotic items on an occasional basis, or to try out lenses and camera bodies in advance of purchasing. I have been happy with the selection and service of Lens Rentals.
IT Supplies: Formerly Ink Jet Art, IT Supplies is a good source for photo printers and printing supplies.
Really Right Stuff: RRS manufactures camera support equipment - tripods, tripod heads, camera and lens quick-release plates, etc. Their products aren't inexpensive, but the quality, fit, and finish is superb.
Zenfolio: My photo web site and store are hosted by Zenfolio. The link to the left includes a referral code that will provide you with a discount to Zenfolio should you decide to sign up (and I receive a small benefit if you choose to do so.)