Try using chromatics above and below the scale notes, especially the chord tones. Also try connecting notes within the scale chromatically. You will find any note will work as long as you resolve it properely. Check out Jimmy Brunos website for ex.'s of this (look under tips)
http://www.jimmybruno.com.....also check out any charlie parker refernce material (omni book), he is one of the pioneers of using all 12 tones to improvise

Combining the major and minor pentatonic together is also a cool techniue...this is something BB King does all the time.