Do you know any good books/exercises on motivic soloing? It could be rhythmic or melodic motivs.
For me Chris Cheek is one of the best in this area, and because of that one of musicians I love most to hear.
The only good book I know on this subject is Hall Crook - How to Improvise (Hal Crook was Chris Cheek teacher).
One good exercise I found is to improvise with a certain beat of the measure (or group of measures) has our focuse point.