I have personal folders printed up all neatly designed for each time I deal with someone. It's not always for webdesign--however it does represent you as "you know what your doing." Plus it is nice to leave a client with something to hold on and actually keep in their hands, so they can look at it at anytime, as well as compair notes and such.

Downside is--if you're not well established or have the money to spend on smaller clients, if they are indeed, you will end up not being able to do stuff like this for each client.