Originally Posted by: magicninja... The sweet spots on a certain string change depending on what fret you're holding down. It's a lot of experimenting and alot to remember if it's a technique you want to use alot.

A place to start in your search for the sweet spots: thumb the string at the point where the harmonic should be. Seems too obvious? If you want the 2nd harmonic (one octave up), you should thumb the string halfway between the fret and the bridge. This point will shift as you fret different notes. And bend the string. As the string scrapes across the fret, it helps to keep the string vibrating. Heavy vibrato can do this too.