Abstract and Macro Photoshop Adjustments

Color Lookup:
http://www.photoshopessentials.com/photo-editing/color-lookup-cs6/

Color Splash:
http://www.iceflowstudios.com/2012/tutorials/color-splash-effect-in-photoshop-cs6/
 
selective focus:
http://www.youtube.com/watch?v=bSZ_Pqh63dM

vignette:
http://rockysnapper.blogspot.com/2007/12/creating-vignettes-in-photoshop-cs3.html

Vivid Color:

http://photoshoptutorials.ws/photoshop-tutorials/photo-effects/vivid-glow.html

Enhance Saturation:

http://www.tutorialized.com/view/tutorial/The-Best-Technique-to-Enhance-Saturation/33311

More Vivid Colors, that look natural:

http://www.tutorialized.com/view/tutorial/Naturally-Vivid-Colors/32530