Blues Licks
http://www.justinguitar.com/en/BL-013-BluesLicks1.php
http://www.freeguitarvideos.com/LJ_Bl/LJ02.html
Using Blues Licks
http://www.justinguitar.com/en/BL-015-BluesUseLicks.php
Basic Blues Scales
http://www.justinguitar.com/en/BL-012-BluesScales.php