Another thing I like to do is fiddle with the guitar. Sure, took 2 lessons in 1995, and played the violin as a youngster, I just like to sit out back, listen to nature and strum away.
There's no real method to it, just start playing. Finger picking style mostly. Look for patterns, yet every song is unique, couldn't play it twice if tried. Just a way to pass the time.
What you may not realize, is the tune is created in real time, the next note is not known, until its played. Complete improv.