Crossing lines from the nature photography world into pets, I'm wondering what sort of terms and conditions you place into your agreements.

Do you retain rights to use images for Promotions, Advertising, Commercial use etc?

Do you grant "unlimited personal use" rights to a client and then include language on what does and does not constitute personal use?

Do you "commit" to keeping the originals available for a certain period of time?

Do you include "educational material" on why "print your own" is a bad idea for the client? Quality (color control, paper, ink, archival quality, etc) is where I would focus this.

For those of you who provide digital copies on CD/DVD, how do you restrict the use of those images, or do you even bother since there is little hope of controlling it anyway?