Try improvising with those scales that you know. Do some things like bending one note of the scale up to the next, hammerons and pulloffs, come up with some licks from those scales and try to make solos out of them.
You could also record some chords in a key your pretty familiar with, and then play them back, playing some licks and fills over them based on the scale in that key.
Another way is to play the scales in different orientations, like here's an A minor pentatonic played a little different than normal;

(These are all triplets)

--------------------------------5-8-8--
--------------------------5-8-8--------
--------------------5-7-7--------------
--------------5-7-7--------------------
--------5-7-7--------------------------
--5-8-8--------------------------------

This is a pretty basic example from one of my old guitar books. Stuff like this gets you used to playing around scales and getting used to different grooves. Try making up your own and seeing what you get, then improvise with that.
Basically, you just need to play your guitar and see what happens. :)