How do change balls of wool when knitting a scarf?
When the first ball of wool is close to the end, change it. Just finish the row you are on, then instead of using the first ball of wool, start knitting the next row with the second one. Leave a little bit of wool from each skein hanging off of the end of the row, and after knitting a few stitches, you can tie the two pieces of wool together. When you are done making the scarf, you can cut off the loose pieces that are left over from making the knot.
