One of the most used strategies I've learned from the Disquiet Junto was Brian Crabtree's 'layered sameness' exercise
It involves layering over a dozen takes without using a metronome, then combining the results into a shimmering cloud.
Recently I took the idea a step further and recorded a piece with MIDI, which was then used to trigger VST instruments.
At the top is the guitar version, while below is eight synthesisers.
I've offered this piece to a friend for their installation at Burning Seed this year.