If possible, set real, quantifiable, attainable goals.
This mean that you’ve seen or heard someone do or perform whatever you goal is. Whether it’s local or a legend, if it has been done by another human, you can possibly attain it. At least in guitar technique. I’m not talking about dunking and things of that nature, there are limits imposed by size and gravity. But, even then, there are those who have managed to attain what most said was impossible. I don’t believe there are these types of physical limits on musical skill, if you’re an average person with no disabilities. I could be wrong. This is one of the things I aim to discover.
For example, I’ve seen and heard plenty of legendary gypsy jazzers perform triplet picking, down-up-down, down-up-down, etc across strings at 200bpm. Eight note triplets at 200 bpm. This rate also coincides with 16th notes at 150 bpm.
So, both of these are my goals and they are measurable. I set exercises, licks, patterns that I aim to bring to these tempos.
Real. You’ve witnessed it in one form or another.
Quantifiable. Can be measured. BPM. Or playalong at speed with recording, or Etude at verified tempo.
Attainable. Again, you’ve witnessed another human being doing it. Theoretically, you should with proper work be able to attain it.
It may take a long time. It may take many different paths to uncover the method, secret tricks. You may have to unlearn many things first. These are all subjects for other posts.
Some people love the metronome, some hate it. I think it’s both great and bad. My advice, use it, but not exclusively. Use it to measure. Turn it on, and turn it off. I will weigh in on the great metronome debate eventually.
Definitely play along with recordings. This is an opportunity to play with great masters. You may learn by osmosis.
Measure your progress in a small notebook. Keep track of dates and tempos.
Be consistent and patient.
And don’t try to do too much at once.