I'm taking a wonderful class on-line to learn more about Photoshop Elements. It is at Two Peas in a Bucket and it is free! They have several other classes listed. Some free; some with fees. Here is the link --> http://www.twopeasinabucket.com/education_class_list.asp
In Sande Krieger's class, she starts at the beginning with Elements. I know many of the basics yet I've learned so many tips and shortcuts. Elements is very powerful and in my opinion very challenging to learn. I've tried books, magazine articles, other on-line tutorials and just plain trial and error. This is the best training I've had.
There are other classes on card making and scrapbooking, too. It is wonderful to have so many opportunities at our fingertips!