In reply to SonyaM:
For specific areas of rubbing, heels in my case which are narrow and allow a bit too much heel lift, I have used Engo patches for years in stiffer boots.
http://www.goengo.co.uk . Heel patches mainly but have occasionally used the large round ones. They attach to the boot and last a long time (many months) if your careful when you put your boots on; I use a shoe horn.
Only tape I ever found effective for my skin was the original Boots sports strapping which was stretchy and had adhesive on one side with a backing paper, but they stopped making it the way it was, and since the newer stuff was much poorer, this lead me to Engo patches. Used
http://www.bodyglide.com on top of the tape for extra protection. Now use the bodyglide on the skin direct. With the combo of Engo and bodyglide, I can't remember when I last had a blister.
Bodyglide maybe worth trying if you have never used it, even if on top of tape as it will reduce the friction on the tape. Just don't put it under sticky tape as the tape will come off or move too easily!