What you do not want to learn when you practice on your instrument

There are things you want to learn when you practice on your instrument and there are things I guess you do not want to learn. If you are conscious of these two types of things you can progress quicker as you can avoid learning things you don't want to learn. Here are two of these things to avoid:

1. Can tensions stick to your sheet music? Yes, in a way at least. My experience, also confirmed when reading about this topic, is that your actual tension level when playing a musical composition also tends to be present when you play the same piece of music in public. Or rather, it will be harder to perform a piece of music in a relaxed way when you have practiced it without having tried to play in a relaxed manner.
2. Can you learn not to play a piece of music? Well, you practice on your guitar in order to become a better player and maybe to learn a piece of music that you like. My experience is that if you don’t concentrate on your guitar playing you can make a lot of mistakes when trying to learn a piece of music. These mistakes tend to slow down the learning process or rather they will be a part of the learning process, which means, the more times you make mistakes playing a particular passage the harder it will be to play it right because of those earlier mistakes trying to get your attention.