I've almost never had to do manual white balance in daylight outdoors .
To warm up the picture a bit, I've used "Shade" white balancing, it gives about the same effect as the PP'ed photos you posted.
I've had to use Manual White Balancing only with difficult shots with mixed coloured lights.
Strictly speaking, you should use a Grey Card for MWB but a white piece of paper works just fine because the exposure system will anyway expose it to grey.
Shots below before and after manual white balance using a piece of White photocopy paper. The lighting is from a mixture of halogen and red incandescent lamps - tough !
Before (Auto WB) - Very red, pretty much unusable shot
After (Manual WB) - looks almost normal