Originally Posted by Jeanniejo
Try a new blade. A nick in your blade will make it skip. Just be careful while cutting and take your time.
Exactly! Don't rush, do change your blade and don't stress if you have to make a cut more than once - it happens. Try to keep the number of layers to a minimum. Buy an inexpensive ruler "gripper" to keep your fingers out of the way.
And, um... Yes, I think that's it. Good luck!