Its been overdone but a friend of mine asked me to show him how to draw a realistic coffee cup in Photoshop, he said he's not using it for web design so I guess I'll show him here. This is what the final result looks like:
Learning Photoshop and all the wonderful things it can do can be a hassle if all you want to focus on is web design/development. Here's some great photoshop tutorials that will hasten your pace into learning all the essentials to make great web designs. I've include UI Photoshop tutorials and text manipulation tutorials. Go and try them out, make some glamorous websites.