I know its hard for some people to do, but you could try making your initial framework with the subdominate hand. Our brains are crosswired when you rely on one hand you're relying on one side of the brain. When you mirror the image you're using the otherside to view it. Also you could try turning the drawing upside down if you can't manage the switching hands thing.
Um... sorry, but that piece folk neurophysiology isn't quite true.
When your eye first looks at an image it's excited by the different values, the colors, the shapes, etc. The longer you look at it the less stimulated your eyes becomes.
I know this works big time with seeing values. The more you stare at them the harder they are to pick out but I'm not sure how much it might have to do with natural skew that most folks start out with.
I've been trying to do this more, but a lot of my work recently is studies from photo reference. Anyone know of an image viewing program that allows easy mirroring and doesn't eat up too much ram while I'm painting?