Styles are the best! They really make your supplies go further and be more versatile. As far as I know, there's no way to load styles as you need them (at least in PSE 6). You can do this with brushes and textures, but not styles and actions.
There are tons of places on the web that offer lots of information on this subject, unfortunately, I can't post a link here. The one that give the best info for styles and digiscrap is a competitor to GDS.
Crystal in PA