I always turn the paper upside down, and then flip it back to make sure it looks good before inking.
You should always make sure the picture will look good from the viewer's point of view. Like, you know how you can draw a picture of a face and it looks fine, but its mirror image looks like you did a very sad tracing of a manga? =/
The more organic and free-flowing your art style is, the more its overall quality depends on the precise orientation that you present to the viewer. If that orientation needs to be changed after the picture is drawn, then you will have to compensate. Counter-intuitive, but true in my experience.