Although I'm not much of a make-up person, these past couple of years I have come to the conclusion that a dash of red lipstick instantly makes you look more polished and put-together, whatever the outfit.
Since then, I've been carrying a red lipstick in my bag and it has saved me many times, when I had to rush somewhere right after work. This one is Russian Red, but I've also caved in and bough myself Ruby Woo as well.
Have you tried them? Which one would you recommend?