How do you guys set your manual white balance?

Right now, I'm using a sheet of blank A4 photocopy paper as my white reference. Or a white shirt when i'm outside

Little while back I read this article about "gray cards"

So is the correct way to get a better picture
a) Set white balance with my A4 paper
b) Get the correct exposure by metering (spot metering?) with the grey card
c) Take the photo

Is that right?

Just switched from a PNS to a camera with manual. Still fiddling around. Thanks!

A. Yap