Insulation

I tend to just walk around my house and try to figure out where the air is seeping in. Odd, but remember that most of this money saving stuff is a game for me. Therefore, I am constantly working on improving the ability for my furnace to keep the house warm and the air conditioner to keep the house cool.

I live in a townhome with really only 2 external walls, so my ability to seal and insulate is much easier then others. Still, I did discover several things when checking out my basement:
1. Most of the duct work going to the 2nd floor was uninsulated
2. When you put your hand next to the furnace, you could feel tons of air leaking.
3. The basement ceiling is uninsulated and makes the kitchen above very cold. (my basement is not heated.)

So, I checked out my friendly DOE website
http://www1.eere.energy.gov/consumer/tips/insulation_sealing.html
and I made some corrections. The nice thing about the website is that you can find the insulation with the correct R-value for your climate. R-value basically being the ability to prevent heat transfer.

Now, I have my ducts insulated, my furnace sealed properly. I also insulated the pipes coming from the water heater. I still need to buy a water heater blanket and the insulation for the ceiling in the basement, but I will get that done soon.

What tips do you all have?