Here's an idea for adding a feeling of motion to your improvisations.
When soloing over an A7, try alternating notes from an A major triad (A C# & E) with notes from a G major triad (G B & D). This gives you all notes from the A Mixolydian scale (minus the 6th F#) the alternating triads give a feeling that the melody is moving...
Here's a couple of examples:
Comments: