I always shoot in RAW format, but i saw in one Forum a question "How i can correct my white balance in jpg files.
So i decide to write here one quick WB correction method.
1. First open the picture in PhotoShop , for this method i will use one of my pictures with white plate.
2. In
layers palette click on
Create new fill or adjustment layer button and select
Levels
3. With right Eyedropper click on the plate (because it's white), probably the picture will gone overexposed, don't worry about it. With double click on the eyedropper you can set the lightness but you don't need it right now.
4. Set blending options of
Levels layer to
color
Sometimes this method is not very useful but 2-3 clicks with eyedropper and everything is going right have to be.
p.s.
Sorry for my english. I will write more photoshop processing, just say what you need.