Here are some books that I think will help.
Headstarts by Natalie Hess (excellent pre-text activities, lots of ways to get students more involved in reading something)
Teaching Large Multilevel Classes by Natalie Hess (some superb activities for doing review, great for making classes more student-centered)
Humanising Your Coursebook by Mario Rinvolucri (very clever ideas for working with a coursebook or any kind of material - you can order through
Delta Publishing)
I have used all 3 books in my university classes and I have found that my students enjoy these activities a lot.
You can go
here for more information about these and other titles.