Branding + Identity
Helpful articles on better understanding what will lead your company to success.
MarketingDeviant + What Makes a Successful Brand
BrandChannel + What Makes a Brand Great?

_Stock Image Websites
Stock photography, illustration and icons to enhance your site.
Thinkstock + Low-cost and yet beautiful photographs also available with white backgrounds!
Shotshop + Offers images that are royalty-free!
iStockphoto + Very popular!
Corbis Images + Impressive images that are on the more expensive side.
Getty Images + Great images, once again a little pricey.
Shutterstock + Like iStockphoto, they offer stunning images at lower prices.

Design Websites
Countless articles and video's to create better designs, client relationships, and more.
Smashing Magazine + Design inspiration, tips, tools, and trend updates. Thankfully, also has a “how-to” section.
A List Apart + Well-written articles about  css, design, working with clents, and much more.
Adobe TV + Helpful video tutorials on Adoble products.
Adobe Video Workshop + Useful tips for using Adobe products.
Photoshop Daily + Great direction and tips for photoshop users.
The 99 Percent: Tips + Great tips for working in the business of design.