Watch the Minor Pentatonic Scale online guitar lesson by TrueFire from Play Blues Guitar 2: Rhythm & Lead Fundamentals
The minor pentatonic scale is one of the most essential blues soloing tools you can have in your toolbox. It is the basis for most blues improvising and usually the first scale most guitarists learn. So having a good grasp on it is imperative. Work on the fingering and listen to each note that you play. You want to get this scale "in your ear" as well as "under your fingers".