Otherwise this is sound advice.

1) Have a plan! Answer the questions, “Where do I want to be in six months? Two years?” Then develop a short-term, three to four week max, practice plan to start you on the journey.

2) Master each part of your practice routine before you move to the next. If you need to repeat a section the following week, keep at it until you get it cold!

3) Play for five minutes max, put the guitar physically down for two minutes, then do your next section till your routine is complete.

Here is a sample schedule for my routine:

a) 5 Minutes – Prayer

b) 5 Minutes – Scales. Vary the patterns but until you are proficient, don’t move on.
2 Minutes -put the guitar down!

c) 5 Minutes – Jean Welles Worship Guitar song Lesson 1. Next week – move to lesson 2.
2 Minutes -put the guitar down!

d) 5 Minutes – Different strum pattern on Lesson 1.
2 Minutes -put the guitar down!

e) 5 Minutes – Arpeggio pattern on Lesson 1.
2 Minutes -put the guitar down!

f) 5 Minutes – Melody line from a song. I’m using a beginners Classical guitar music course to improve my note sight reading and technique. Following week – move to another song if mastered.
2 Minutes -put the guitar down!

g) 5 Minutes – Memorizing fretboard notes and scale patterns from another guitar course. Start with all the C’s first week, next week D’s, etc.
2 Minutes -put the guitar down!

Then at the beginning of the new week, I print out a new schedule based on what I have mastered and where I want to go next.

Hope this helps. I feel like I wasted a huge amount of time over couple of years by not building a plan sooner.

God is Good, all the time!