Watch the Expressions online guitar lesson by Larry Carlton from 335 Blues Motifs
Bends, vibrato, slides and all of the other expressions in your toolkit are also excellent ways to fashion and develop motifs. Bend to a target note. Then slide to that target note. Same target note - two ways to get there. Two different sounds to entice you audience with and mix things up.
Spicing up your solos with expressions adds a whole new dimension to all of the other techniques presented thus far, Use them in combination for infinite possibilities.