One other great idea for the tail.
If you're making a sweater, or other item which will be seamed up, leave enough of a tail to use for sewing the seam. Just wind the end up and secure it while doing the knitting and you don't have to use an extra piece of yarn to do the sewing. Try to allow about 3 times the seam length for the tail.
Unfortunately this won't work with scarves or shawls.
Happy Knitting :XX: :XX: