If you use Randy's method, make sure you're on the compression stroke. If you're on the exhaust stroke, both lifters will be up a little, throwing the adjustment off.
I like to set the intake valve when the exhaust just starts to move on that cylinder and the exhaust valve just after the intake closes. Easier for me to go right down a bank on one side and then jump over to the other side.
Just my 2¢
Greg