Lately, I get more inspiration out of practicing...
Over the past two years, I've been studying chords and chord theory.
I try to learn a new chord weekly by going through some practice routines and inserting the new chord (via 1st, 2nd and 3rd inversions) into the routine.
Most of the time, the routine is playing the circle of 5ths forwards and backwards.
This, 9 times out of 10 will inspire me into writing..