My planning style resembles that of Deniz.
I teach at a private English academy and have several teenage and adult classes. They have 2 1 hour classes a week. I normally plan a couple of classes in advance. My style resembles Deniz's because I try to plan the lesson in a logical order of actvities as I also think this helps the lesson flow. However I don't agree that without 'flow' the students get bored, that's down to the variety of activities and enthusiasm of the teacher. Normally we start off with a chat/warmer about the theme based on the theme of the unit or lesson, then we move onto the vocabulary and do a reading or listening. Then I normally do a speaking activity connected to the grammar point.
I also normally set either writing or grammar work for homework, depending on students' needs.
Every month or so we do a lesson completely away from the book, normally apeaking or listening based, or we watch an episode of a series in English with comprehension questions, just to break things up. They seem to really enjoy that.