Herringbone Twist Pattern

Herringbone stitch makes a very attractive fabric. It does tend to pull together, so be sure to go up a needle size or two.  
Pattern
Cast on an even number of sts.
Row 1 (RS): Knit 1, *Slip 1, Knit 1, yarn over, pass slipped stitch over; rep from * to last st, Knit 1.
Row 2 (WS): *Purl 2 together, do not slip sts off needle, purl first st again, then slip both sts off needle; rep from * to end.
Rep Rows 1-2.