I always shoot auto-WB. The D750 and D810 are pretty good at getting it right. Those cases when it isn't, I use post to correct it. Usually it's not hard to get it right in post but there are times it is. Especially when doing night photography.
I don't use a WB card as often as I should but it sure helps nail things down when correcting color. I use the WB Tool in Adobe Camera RAW rather than a default setting like Auto or As Shot although if I'm in a hurry, and one those looks like it's giving me an acceptable result, I'll go with it. While correcting WB is a good first step, color correction is about a whole lot more than just WB.should have said a white balance card
or do you use LR to adjust your WB?
if LR custom, as shot or auto?
I have an X-Rite Color Checker Passport and it's fantastic. It makes color correction soooo much faster and the results are spot on. My only problem is I tend to forget to take it with me. In fact your post reminded me of this very fact and just went and pulled the Passport out of my bag. I'm going to try and get into the habit of using it regularly. So thank you for that!I use X-rite's ColorChecker for in-door stuff...I have created camera profiles for my cameras with it for outdoors...
ExpoDisk.
Easier to use and a more accurate method than using a WB card, because the WB card method accuracy is somewhat dependent on dominant light angle relative to the card.
With the ExpoDisk, simply press the WB button until "PRE" blinks on the LED, snap the ExpoDisk over the end of the lens, aim in the general direction of the lighting conditions affecting your subject, press the shutter button, and when "GOOD" blinks on the LED, WB is set perfectly.
When you change to a different lighting situation, it only takes a few seconds to reset a custom WB for the conditions with the ExpoDisk, and it doesn't take up much room in your camera bag.
IMO, of the available options, the ExpoDisk is the most accurate way to get WB correct in-camera.
T-Man, I just ordered a 77mm ExpDisc, from Victoria $65 + $10 express shipping
I keep my camera set to Auto-WB at the moment. I'm not experienced enough with everything else to try tweaking that during my shooting (My wife says it takes me long enough already, messing with WB will just get her more agitated!).
I find Lightroom does a good enough job of correcting it from RAW where I need it anyway...and she doesn't mind as much on an evening when she can watch the TV and I can process my photos.
Not to get too far afield here... but most Nikon cameras that I'm aware of, allow you set a custom WB in the camera based on the current lighting... and all you need is a #2 drip coffee filter with a rubber band...