I usually start my day in the studio with some sort of play, warmup or experiment that has usually has nothing to do with projects in progress. I use this time to fool around with materials and explore the 'what would happen if I.....?' factor.
So the most recent experiment went like this: What would happen if I made marks with a long narrow rigger brush loaded with india ink.... then what would happen if I sprayed it with some water when it was still wet in areas, let it drip down and used a paintbrush to create some grey tones.
Then what would happen if I let it dry and painted in the sections with acrylics: