One of the most talked-about features of Adobe Photoshop CS5 is Content-Aware Fill, which can intelligently, and almost magically, replace image data you don’t want with image data you do want. The healing Brush now uses Content-Aware Fill’s algorithm by default. But for areas too big to correct with the healing Brush, try using it with the Fill command.
To do so, grab the lasso tool. Roughly encircle the offending element—say, a piece of garbage on an otherwise-pristine beach—and go to Edit > Fill. Use the pulldown menu to select use: Content- aware. Leave the Blending Mode at normal, and click OK. Then watch as the garbage disappears, replaced by clean sand.
Too bad it works only on images.