Instead of breaking out a root touch-kit to hide the fresh outgrowth, I have a quick color fix that will work the same way–only without the styling hassle left after repairing with one of those gigantic mascara wands that comes in this type of kit.
You will need your hair spray and eye shadows. All that is necessary is lightly spritzing the roots with hair spray first before dusting on some shimmering gold eye shadow, especially for blondes or soft to dark brown for brunettes.
This method of temporary touch-up will keep the gray from not showing. It also will make it much easier to style your hair.