Remove Background Photoshop techniques

Techniques to remove the background from images:

http://graphicssoft.about.com/od/photoshop/l/blrbps_3aleaf.htm

http://www.sitepoint.com/article/masking-techniques-photoshop

http://www.photoshopcafe.com/tutorials.htm

http://www.rnel.net/tutorials/Photoshop/Basic_Techniques/27