Udemy again offers Patrick O'Malley's Learn Guitar: Zero to Guitar Fingerpicking in 30 Days Online Course for $15. Apply coupon code "G1UA202" to drop the price to $10. That's $40 off and tied with last week's mention as the lowest price we could find. It includes 2.5 hours of video and teaches you to play the most common guitar chords in a fingerpicking style. Deal ends August 15.