I came across this really pretty stitch that I found on MyPicot, called the Honeycomb Stitch. It takes about 7 rows to complete the entire pattern, but you can then choose to add another few rows without actually having to do an entire additional repeat. I thought that 10 or 12 rows made a wonderful width for a scarf and am thinking about using this pattern again for something else in the future.
As you can see in the photo below, I used two very similar colors of yarn for this scarf. If you want the pattern to really stand out, use multiple colors like the sample on MyPicot shows.
I recommend printing out the diagram provided. Since each row is slightly different, it is much easier to follow the diagram than written out instructions. I found the that I caught on to the pattern very quickly this way. On each long edge, I finished it with single crochet.