What is the easiest way to make a nice, clean cut on 1/32" copper board one sided?

I'm about to start making my boards for my little project and really don't want to screw up cutting them out since the price of the boards is rather steep. I'll be cutting 9 smaller boards from a larger one so a lot of cutting and/or breaking and ruining if i'm not careful.

Any advise/suggestions would be appreciated.

Thanks.

Bart