Be sure to buy your sewing scissors at a fabric store. Sewing scissors are specialized scissors that often have one sharp point and one blunt point which allow for better cutting of fabric.
If you will be cutting a lot of patterns, be sure to purchase scissors that have a flat bottom and have handles that are offset from center so that the the bottom can be kept flat against the cutting surface.
Understand that a good pair of sewing scissors are not cheap. They are an investment and should be protected and cared for. If taken care of properly, they will last you a very, very long time.
NEVER, NEVER cut paper or use your fabric scissors for anything other than what they are intended!