This is a sweet article I just came across while participating in a discussion about how to convince clients to hire an Architect/Designer. The article is centered around photography, but easily applies to architecture as well. It’s worth taking a look at.
r | one studio architecture
architecture and design in the 21st Century
r | one studio architecture 
you should look at http://www.modative.com/ They have some great ways at selling their services and engaging the client.