Everyone uses Photoshop differently, it is one of the great things about a well designed tool. I love showing a new Photoshop user a few basic tricks and watching them tackle problems in completely unique ways.
Cut the Repetition: Image Processing with Actions.Design
So you inherited a file with thousands of high res jpegs that need to be resized for web use, great. You could spend the week mindlessly resizing them one by one, or do it once and have Photoshop do the rest of them.