White balance

[icicle]

I use my white lens cleaning cloth, or a white shirt, white lines on roads.
I prefer to use what is on hand and convenient at the time.

[another view]

Try that technique using the cap from a can of Pringles, or some similar piece of neutral translucent plastic.

Bigger deal if you shoot jpeg than if raw - with raw I shoot a camera that rarely needs adjustment; with jpeg I shoot a compact that's pretty good too. I just adjust in post production and always stay in auto WB.