Are you setting the custom white balance on your camera?
If not, here are a few great videos on the importance and simplicity
of setting the custom white balance on your camera.
Many photographers set it several times throughout the day
to match the current lighting conditions,
to take better pictures, without needing to correct the coloring later.
Watch this great " Custom White Balance Tutorial Video"
Photo credits: Loveliestdreams.
How to shoot events