Paul,

What camera have you got, if it can take RAW then use that and adjust the temp when converting from RAW.

I have a Canon and its permanently set to 5500 and then I adjust it when PP'ing. I have never used any of the Auto WB's even in the day's of film and adjusted in PP.

If its a compact then the Nikon L6 I have is set for daylight permanently unless I'm skiing then I use exposure compensation.

I have rarely used anything other than a piece of white paper to get the white balance right if I think its going to cause a problem. On that occasion it was indoors and people pictures so that I got the right skin tones. Never used one for landscapes.

Roger R.