The Dim Chord can be your best friend when it comes to playing chords or soloing. Let's relate this to a blues situation and take the basic 3 chord blues progression in the key of D.
That would be D7, G7, and A7.If you don't already know a diminished chord is a Dom7 chord with a (flat b9) so you can easily interchange the two.
This is the same with scales, play a Diminished scale instead of a Mixolydian or a Pentatonic. So with a blues progression of D7 G7 A7 try replacing them with a F dim, Bb Dim and C Dim. And all you have to do is move each chord up a minor third to get 3 new Diminished chords. Ab Dim, BbDim, Eb Dim. In theory theres only about 3 Diminished chords.
Remember you can relate this will scale ideas too. For example play a F dim over a D7 chord or A flat over a D7 etc. It does take some practice but once you get the hang of it the sky's the limit.
