Tori,
I simply put in my copyright mark on a type layer: ©JAG2008. I can select typeface and what color based on the image and I usually add a drop-shadow via layer style.

Same with my PROOF mark: I create it on a type layer, rotate it to 45 degrees and fade it down to about 55%. I leave it on the image and then save it as a layered .tif before I create a jpeg for online posting.

When it comes to proofing, it all depends on the client(s). I like to proof on PBase so I just upload to a directory and send that link to my client. They pick the image numbers and email me their order.

Some clients prefer hard copy so I'll do proof books which I order via WHCC labs.

For shows, I print 4X5 proofs and mail them with order forms. Once I get a pre-paid order, I'll order the final print from my lab and have it sent directly to the client.

My portrait clients actually prefer to review the proof books and, given the variability of monitors both with and without calibration, I think that's the best way to present the images. Online may be easier but what looks like great skintone on my monitor may look blue or yellow on yours. At least with a proof book, I can present the images the way I want them to look.

Hope that helps,

Jim