I always shoot with WB set to daylight.
Except when I am lazy of forget, for a given location (geographic and season dependent) I take a calibration shot at sunny sky using ExpoDisc; http://www.expoimaging.com/product-detail.php?cat_id=1&product_id=2&keywords=ExpoDisc_Neutral
That gives a calibrated shot for actual daylight of a geographic and seasonal location, with which WB I initiate my processing. If light changes during day, it leads simply to that I will capture that change and the color change of the actual light compared to daylight. Obvious I do not want to neutralize the light in landscapes, I want to capture the light. Same goes for filters, I want to capture their effect when I use them, not neutralize them. However I can also make other calibration shots to assist me when processing, in case I think the color (WB) change is too large.
Yes, I also carry with me CCP which is excellent, but I rarely use it and especially not for WB.