Do you have ideas on smart use of time for teaching?
For example, in lectures I use a mix of slides for general points and equations but the whiteboard for diagrams and working out examples. I believe this is fairly effective for students, requires them to take coherent notes and be aware and active in class, but also minimizes the time I need to spend in preparation.
I had a good experience with assigning a 1-page report on a research paper, giving students sepcific questions to answer in the report (that required thought beyond what the paper said) --- it was fun, fast and easy to both develop and mark, and I think was a good learning experience in a 4th year course.