Simple But Shiny

Here's a very easy way to dress up a very basic scarf.

Basically, take a ribbon and wrap it around your already tied scarf in whichever style you prefer (this is just a basic triangle with the ends tucked under to give a little bulk).  I like to wrap twice- it gives some consistency.  A shiny or patterned ribbon can add significant excitement, without adding any difficulty to tying the scarf or bulk on the head, and they go on quickly.

I think the ribbon does a nice job of making this dollar-store scarf look worthy of a work day, or even a shabbos.