Best way to cut?

[RobertC]

In the near future I will be cutting up some sheets to get out certain cards and get them graded. What is the best way to cut up a thin paper sheet and a thin cardboard sheet. Should I use scissors, razor blade, or X-acto knife? How much should I leave around the border. I am not real sensitive to grade, but I would like to get the best I can. I also have some sheets of perforated stamps. What would be the best way to separate them? I realize that some collectors do not like splitting up sheets, but I purchased these knowing that I would be cutting them up. There are a few cards/stamps that I have been unable to find, and this is probably the best way for me to obtain them.