From the Forums: How can I green my apartment?

Image Credit: paulk

graciela asks:

As a renter I can't install new windows, work on the insulation, or make any permanent changes. So how can an apartment dweller green up their home without making structural changes? I already leave all of my electronics unplugged until I need to use them, I use CFL low-watt bulbs, I take navy showers, and on and on...especially since the hot summer is coming up, how can I keep my bungalow cool?

It is already a blistering summer in most places. Any ideas? Post them here.