Mainly on my own. I work as a photographer in a big studio, so we have to use PS everyday.. U get used to it day by day. But what i retouch in my spare time is a whole different kind of retouching than the work I do in the studio. But the technics are pretty much the same
Sometimes I search for tutorials to learn new workflows. Youtube is a nice and free source. I like video-tutorials more than the step-by-step ones. Check out: [link] They got a lot of nice tutorials.