Own something in khaki; a trench, a jacket, a skirt or a t-shirt. But be quick, before everyone and every shop's window turn into khaki. As Garance Dore mentioned "Khaki is the new black"
Khaki is not the trend of spring, but also next fall as seen in several Fall/Winter 2011 shows. And even at the moment, you can see khaki in most of the street fashion blogs and worn by the fashion industry crew.
I have already picked a khaki jacket from Zara Spring collection :-)
Zara 2010 Spring Lookbook
And here are some khakis caprured by Tommy Ton during Fashion Week...