I recommend to anyone shooting ... to Always check their white balance.
I don't know how many times I have taken a few guys on shoots ... and get the footage back with either Blue or Orange tint.

(Blue - outside with indoor white balance)
(Orange - inside with outdoor white balance)
Especially if you are with 2 camera operators ... be the better person and match the cameras white balance.
Another tip for white balance ... find the subjects main spot and white balance in that area.
For instance:
... at a wedding ... white balance the front alter
... at a corporate event ... white balance the speaker or product of importance
Lastly ... don't always trust the Auto White Balance ... Create your own presets. The ProSumer cameras today have 2 presets and an auto ... use one for outside and one for inside.
-Ray-