Watch the Root 6 Minor & 7th Barre Chords online guitar lesson by TrueFire from Play Blues Guitar 2: Rhythm & Lead Fundamentals
These are the Root 6 minor and dominant 7th barre chords. You can find these in a ton of songs and chord progressions. Memorize the fingerings and practice slowly moving them to different places on the neck. You will find certain chords sound great together - use this to help you develop your ear as well.