Watch the Learning the Melody & Basic Chords online guitar lesson by Fareed Haque from Solo Guitar Handbook
Please check out the chart for basic changes and melody as well as basic jazz changes. Make sure to play this in at least 2, ideally 4 or 5 keys. This will get the melody and changes in your ears, not just your fingers.
Oh, and another word to the wise: after flossing, blow your nose! I mean, what the heck am I doing at 1:36? Well, I guess after you hear my singing, you'll be ready for anything. Yikes!