So not only am I having to remember what to do, those things to do are the challenging things. After a while, there's enough good stuff in there that the unprepared stuff is starting to sound bad by comparison. Those are the areas of freedom in the song. However, it's not that easy. Now I can make mistakes.
Musical mistakes are always possible too.
But it's a lot easier not to make musical mistakes if you're not challenging the limits of your technical ability. Of course, challenging the limits of my technical ability is one of the fun things I like to do, which means that mistakes are inevitable, both musical ones and technical ones. Now it's hard to know when to stop. This, I believe, relates to the self doubt and lack of appreciation of their own material that happens to artists. The desire for perfection.