One of the most commonly needed techniques in Photoshop Elements is to fix a soft focus image. There are several ways to improve the focus and sharpness of a photo and which you use depends on the photograph. Here is a video on when and how to use the different sharpen techniques in Adobe Photoshop Elements.
While you are here don't forget to take a look at my YouTube channel. Tons of other great Photoshop Elements how to videos https://www.youtube.com/user/howtogurus/featured
If you really want to learn how to use Photoshop Elements you should get my Complete Photoshop Elements course here howtogurus.com