cardstock cutouts?

[temporaryage.livejournal.com]

If I want to make several clean, uniform cut-outs of a complicated shape (i.e. a tree or a star) out of cardstock, what is the best way to go about doing this and make them all as uniform as possible?

edit to be less vague: I need to make about five cutouts of a tree I have drawn, and possibly some stars, but that doesn't matter as much. What I am really concerned about is having five tree cutouts that look exactly the same and have clean, neat edges. I hope to have them about five inches by seven inches.