Enjoyed reading all your posts. My routine has fixed exercises and routines that change as I learn.
1 Finger strength, 4 finger runs up/down, then skip strings (6-4-2-1-3-5), real slow at first. If I miss one, I start over.
2 Finger stretching, justin's exercise and the worm (3 and 4 finger).
3 Chord change, usually a change in a song I'm having trouble with. Track # of perfect switches in a minute.
The above are daily, 10-15 minutes. The following are also good beginner practice routines, but vary (for me anyway) with interest, need and time. Need discipline.
+ Scales & mode (patterns), + Strumming patterns, + Fretboard note recognition, + 5 pentatonic shapes
More days than not...make that most days, after a short daily routine, I just PLAY.
Finger strength and stretch are a daily must, pay big dividends over time.