Open D, Dsus4, Dadd2 ...moving up the neck:

Open "A" Power Chord with Undertones

Improvisational Guitar Solo: Pick + Fingers Technique

In the style of Jimmy Page, here's an original solo using the pick along with the middle finger:

Tapping Harmonics on the Guitar

Improvisational technique for guitar using tapping harmonics:

Jazz Jam #1: Improvised Lead Solo

Here's an improvised jazz guitar solo in the key of A minor:

Line 6 Jam: Over-Dubbing Using a Loop Sampler

Dedicated to advanced students on the spectrum, this is a demonstration on layering guitar tracks on top of one another using a digital loop sampler: