Paolo's planning style is more like my own. His approach resembles mine because I also teach adults who need to be permanently motivated and kept alert, this is why variety should be the keyword when describing classes. Balance is important too as well as cohesion and relevance.
When planning I prefer to plan a series of lessons, I have the inclination to plan in great detail, more precisely to try and think of possible issues, anticipate things or find various ways of adapting activities to the specifics of my group. Anyway, I always start with the general idea of what will fit.
With respect to what advice I would give the new teacher that would be to try to get to know the class better, learn about their interests and needs and consequently focus on what will fit, constantly adapting and personalising materials.