Suppose I want to make a change from say playing in Amin7 to Amaj7,and all I know is the pentatonic scale. Here's what I could do...play Amin pentatonic with all my favourite licks over the Amin7th and the moment the chord changed to Amaj7 I would play the same licks,same shape just down a half step i.e. Ab minor pentatonic,a cool sound which doesn't even have the 'A' note but has all the other relevant sounds,the hip sounding lydian with a #4 in this case Eb.So yeah try that out in all other keys :)