One of the first things I realised as a teacher is that good lesson planning takes time and experience. It will get better and as a teacher you get better over time in planning and execution. Secondly, I find collaborative lesson planning are important as putting many heads and different perspectives into a plan only makes it better. Thirdly, one needs to be always prepared to make changes and adapt as the lesson progresses because when you have 20 different individuals in a class, things are never guaranteed to go according to plan. Lastly, always have a backup plan when you are planning to use technology in the classroom. You never know what can go wrong, and they do go wrong.