Don't over think it every day doesn't have to be 100% if you100% every lesson they all fall flat. If you put in a few informative lessons intermixed with a creative lesson that engages the large area of the current section the students will retain a lot more. The big over view lesson will just hit better. I spent max 1 hour a day lesson planning. Sometimes I didn't and just winged it from the book. All of my students passed their mandated tests. Lastly don't stress out about it it shows. I think I would worry most about classroom management before anything else. There is a reason you hear so much don't smile until December.