Installed a few spring clips on the overhead just behind the front seats. These hold up a light blanket that we have to serve a few purposes:
a) It allows us more privacy from the front windows when "camping" in a public area;
b) Allows us to heat or cool a smaller area in the rear; or
c) Allows us to isolate the entire living area behind the front driver/passenger seats so that we only have to use the air conditioning up front when we are driving. This works REALLY well and we typically run the AC on the lowest setting in the hottest weather and still freeze ourselves while the back area can be stiflingly hot!
We also picked up a pack of cheap suction cups from the Dollar Store along with some springy wire clothes pin type clips. The wire slips nicely through the holes already in the suction cups and so we have these handy relocatable clothes pins that we can stick where ever there's a smooth surface. Perfect for a damp swimsuit, wash cloth or drying light clothing. They are also perfect to position a hanky onto the sunny side of the front side windows (not windshield) to act as sunshields on those long, straight runs.