[WorldMaker]

I've heard [1] that you can go into Device settings for the pen/handwriting-recognition and set it to left handed and it will get better at ignoring the touches from your hand to the left of the pen.

[1] Not left handed myself.

[soylentcola]

Just verified this on the 1st gen Surface Pro I've got here at work. Hit the Win key, type "pen", open "pen settings" and the three basic options are "choose which hand you write with", "show visual effects", and "show cursor".

I'm not left handed so I can't comment on efficacy but the option is indeed there.