How to Carry Super-Full Grocery Bags

I tend to be kind of short-sighted at the self-checkout counter.  I always try to fit my groceries into as few bags as possible; but then the bags get so full, I can barely grip the handles to carry them.  But I just found a trick that's going to solve my grocery bag problems forever...

Just use a second bag to bridge the gap between the handles.  Brilliant!