Learn & Master Guitar, developed by experienced guitarist and instructor Steve Krenz, is one of the most comprehensive DVD-based video guitar lesson packages around. It starts off with the absolute basics such as tuning and simple chords, but by the end of the course, gets into more advanced topics, such as soloing, improvisation, and chord substitution.

There are 20 DVDs in the package, each one covering in depth a specific topic listed in the accompanying instruction book, as well as 5 CDs with a great variety of decent jam tracks.

The quality of the material presented both on the DVDs and in the CD recordings is excellent, and one of the benefits of having the lessons on DVD, is that you can watch a particular lesson over and over again until you're happy with it...

Jamplay is a membership site, where for a monthly fee, you get access to a huge range of video guitar lessons from a number of different instructors. The lessons cover a wide range of music genres, from Rock & Metal, to Blues & Jazz.

It's good for all skill levels too, as you can just go straight to the lessons that are right for your level.

Overall, a high-quality site, with plenty of new content being added each month..

Guitar Scale Mastery is a membership site aimed at intermediate / advanced guitar players, which teaches a system on how to 'internalize' and understand any scale in depth, and incorporate it into your guitar solos and improvisation.

Many guitar books and courses teach a range of different scales & fretboard finger patterns for them, but few go to the level of detail that you need to really 'assimilate' a scale, so that using it when soloing is second nature. This course definitely does go to that level of detail...