Thermal underwear, sweatshirts, and sleeping caps will allow you to turn that thermostat down quite a bit. Add or remove layers of clothing and keep your bad hands off of the thermostat. Think of clothing as your first line of defense, not your last.
Outlet "blankets" and window film can probably be found in the same aisle at your favorite home improvement store.
I made my basement significantly less drafty by eliminating my old "open flue" natural gas water heater. At current energy prices the electric one I replaced it with costs more to operate , but the added comfort and reduced load on my furnace make it a worthwhile switch. Show your landlord
this chart and try to convince him that electric is the way to go. I'm assuming you live in an area where electricity is cheap and reliable (i.e.
not CA).
Pay for better appliances yourself if you pay the utilities and are planning on being there for at least five more years. Make sure your landlord shows you three different quotes from three different plumbers before you foot the bill though.