I watermark all of my photos. I know a lot of people don't believe in this, but after having my work showcased on other sites and then sometimes seeing credit given to another crafter I will always believe in watermarking my photos.
So how do you get a pretty watermark?
I purchased mine for $2 from http://stampinbygenny.com/watermarks/
She even includes directions on how to add them to your photos!
Tell her Shawn from Crafty Chics sent you!