There's nothing more annoying that cutting out a purchased sewing pattern with great care and ending up with a rip while you're pinning the pattern piece to your fabric. Or when you're removing the pattern piece from the fabric. However you end up with a tear, torn pattern pieces can be easily repaired in very little time.
The first instinct of many people would be to grab the nearest roll of tape and just tape up the tear. This works, but only as long as you don't apply any heat. Traditional tape melts when ironed, ruining the pattern, your iron, and and fabric the melted tape happens to touch. Instead of using any old tape to repair rips in sewing patterns, purchase paper bandage tape. This tape will hold your pieces together, but it can also handle heat. You can iron the taped areas just as you can the rest of the pattern. Keep a roll of paper bandage tape handy for repairing tears in pattern pieces.