Watch the Scale Bending Exercise online guitar lesson by TrueFire from The Indispensable Toolbox for Guitarists
Scale Bending Exercise - Concept 10 is a video guitar lesson presented by Shane Theriot and is sourced from Solo Mojo.
This is an idea I got from Tommy Tedesco out of a magazine years ago. I've found it helpful for developing accuracy and bend notes in pitch. Try this with different scales and on adjacent strings as well.