Window covering

Large furniture stores offer a good selection of blinds and curtains ready to install, and curtain rods and rails. The styles and colors are usually basic and prices reasonnable :

Pottery Barn


Crate and Barrel



Another easy way to find what you want is the web. Roman shades, drapery, wood blinds, customized window treatment... Samples and swatches, measurements, delivery and assistance are most of the time offer for free. 

The Shade Store (The SF store is located 1932 Fillmore street)

Smith and Noble

3 Day blinds.