Here are some links we've found very useful:

The American Institute of Architechs (AIA)
Based in Washington, D.C., the AIA has been the leading professional membership association for licensed architects, emerging professionals, and allied partners since 1857.

Northwest Washington American Institute of Architechs (NWAIA)
This is a chapter of the AIA that serves Whatcom, Skagit, Island, and San Juan Counties. (Many of our clients belong to this chapter.)

National Assocatiion of Realtors
This is a great resource for all things real estate.

Ken Rockwell
This is a great site for photo equipment reviews.

Grammar Girl
Struggling with commas? Wondering what the difference is between 'take' and 'bring? What about 'who' and 'whom'? You'll find answers to all your grammer questions here.

Advertising Photographers of America
Their stated goal is to establish, endorse, and promote professional practices, standards, and ethics in the photographic and advertising community.

Editorial Photographers
Their mission is to educate photographers and photography buyers about business issues affecting our industry, and in the process raise the level of business practices in the profession.

Professional Photographers of American
This is the world’s largest nonprofit association for professional photographers, with more than 20,000 members in 54 countries.