Brokenwing, we have a normal curtain pole above our front door and are just careful about how we close the door, so as not to catch the fabric. Its not perfect but when I looked the riser rods cost a fortune and it is still possible to pull the curtain across and close the door while you are out. That said, the riser rods Tianc linked to look cheaper than others I've seen, so I might well look into getting one to now.
If it helps anyone, I have just bought a complete base layer thermal undies set from Sports Direct for £4.00.
One of the best things we've ever bought was a dehumidifier from B&Q (iirc it was around £70 in the sale). It does cost electricity wise, but the difference it makes to the ambient temperature and feel of the house is incredible, it can change a room from feeling chilly and damp to warm and cosy in under an hour. We tend to use it most in the bedrooms, moving it from room to room and it has really helped with the damp we tend to get on all the outside walls and corners.
We do have central heating, but try to use it as little as possible. We have a portable thermostat though, which means we can set the boiler to go off when whatever room we are in is up to temperature. We also turn all the thermostatic valves off in the upstairs rooms during the day and only heat the living room and kitchen, which is where we spend most our time.
We also have draught excluder round all external doors, brushes on the bottom and then the fabric/stuffed draught excluders as well.
I can also highly recommend doing either the 30 Day Shred or Banish Fat Boost Metabolism work out dvds in the morning to warm you up and keep you warm for most of the day - it honestly takes me hours to cool down after doing them! The dcs also like joining in, so it gets them moving and warmed up as well. 