All the time! I had a bad day yesterday. I've had many days straight of pretty good practices. I attribute that to increased practice due to not being able to go anywhere!

But yesterday was a train wreck. I don't know why. There is a particular barre chord change that I am working on that is driving me crazy. And there is a blues rhythm piece I'm working on. Yesterday, these were both horrible. The second chord in this change (Cm) I could not form to save my life. And the on Blues Rhythm piece there is a chord with first finger on the 9th fret 3rd string and my pincky on the 12th fret 4th string, a double stop type thing. I could not get it right, again to save my life. my pinky kept muting the 3rd string.

Today, they were smooth as can be!

It happens. Progress is not a straight upward sloping line. There are and will continue to be bad days.

I've heard different theories on what to do on those bad days. I've heard pound it out and I have heard put the guitar away and do something else enjoyable. I tend to do the former.

Hopefully one of the knowledgable instructors on here with share thoughts.