Create a custom screen saver using Flickr

Using Flickr (www.flickr.com), search for pictures of whatever you are interested in.

For mine, I wanted cool pics of Tokyo at night. Make sure you search only for pictures that have a Creative Commons license(creativecommons.org). This allows you the right to use the images for non-commercial uses, and to download the high-res images from Flickr. As you find images you like download them into a local folder. Using your OS's preferences, set up your screen saver to run a slide show using that folder. You can also use this to set your desktop image as well.

This may seem time consuming, but if you are looking to see some really cool photos and need to kill an hour at work, this is perfect project.