Came across this today http://bagateller.tripod.com/tips/twined.html
- can't say I'd heard of it before.
It's a Swedish traditional way of knitting, using both ends of one ball of yarn and twisting the yarn as you work.
Seems it produces a wind-proof fabric, especially useful for mitts and hats - just the thing if you're up to your ho-hos in snow.
Anyone tried it?
Scroll down to the bottom of the link and you'll find this primer
on how to untangle yarn - handy to know if both ends of your ball want to meet up with each other, for whatever reason.
All the Best