Some of the examples he used for contemporary painters include Giorgio Morandi.  I didn't know of Morandi's work, but I do like his subtle shifts in color and tone.  Here's an example.
Now here's one of Tim's pieces:
Finally, here is the exercise I did based on a still life Tim set up for us.  The point was to use vivid, contemporary colour, but to retain the sense of depth by handling colour temperature.  It's not a masterpiece by any means, but I like the colours.  It was a 15-minute excercise.  Size is about 8x8.
Later in the day, I led two "walk and talk" sessions through the Member's Gallery.  I had a dozen people each time.  I didn't have to break out the balloon animals after all.Tomorrow - figure workshop with Megan Williams.