One secret I have when knitting things with two colors - watch how you turn your knitting when changing sides - i.e. knit row to purl row. Make sure you turn it one way (clockwise) and then when you get to the end of that row turn it back the other way (counterclockwise). If you can do this faithfully, the yarns won't wrap around each other so much. At least until you put it away in the knitting bag or basket, and then all bets are off.

Nothing bets the great look of a scarf and a denim jacket...I became addicted to knitting scarfs during winter (knitting aussie)I made myself two, my MIL one and BIL one too! Enjoy knitting your scarf but be careful, their addictive!