My planning style is similar to Paolo´s. I think variety is very important to keep students engaged and to allow students to practice different skills. Even if students haven´t studied too much grammar before I would still focus on skills and maybe throw in a grammar activity to change the pace and allow for some individual work too.
I consider the following qualities important when it comes to planning a lesson.
- relevance: people are more motivated to learn if what they´re learning is related to their work and/or goals.
-balance: different skills and language systems should be addressed throughout the course.
- variety: because everyone learns in a different way, a variety of approaches and activities would keep students interested and expose them to other ways of learning a language.
I plan lessons one at a time and start with the aims. I use the coursebook but often change a few details about activities and I discard those which I think won´t benefit the students in a particular context. I usually look for ideas on the internet or on books about classroom activities and I like to have backup activity in case one is completed too early.
I would say: Know your students and their needs and plan a lesson accordingly. Aim for activities that would benefit most, if not all, students. At least for me, planning every detail or planning too much doesn´t work and tuning up to students and being open to the possibility of changing the lesson plan as the class progresses goes a long way.