Actions allow me to be much more efficient with my time in Photoshop.  I try to automate any repetitive task I can in Photoshop by building actions.  One of the most common actions I run is the one I demonstrate in the video.  I resize, sharpen, add a watermark, position the watermark and save the jpeg file in a specific folder on my hard drive.  As you’ll see in the video, if done manually, this can take 5-10 minutes each time, but if you record an action it takes a few seconds.