I'm a leftie and keep my mouse (or, if I've got any influence over the choice of pointing device, a trackball) on the right. The biggie is that it frees up my

I'm a leftie and keep my mouse (or, if I've got any influence over the choice of pointing device, a trackball) on the right. The biggie is that it frees up my dominant hand for writing - additionally, I've noted that my fine-motorical skills using my right hand has improved drastically over the years, to the extent that I am now almost ambidextrous. (My handwriting is definitely readable when written with my right hand, but I find it more of a mental effort for less gain than simply just writing with my left hand...) Think of moving the mouse over to the 'wrong' side as an exercise in building redundancy. :)