Originally Posted by Roman_K

This is your first set. If you think that it is truly bad, you may re-roll it two more times, but be advised that once you do this, the result is final. You can't change back to the previous set if your next set is worse, so think carefully before discarding one.

Once you pick a final set and choose which number goes to which characteristic, you may shift 3 points from one characteristic to another. You may repeat this procedure twice (note for those who read the version of the rules thread before the edit, yes, it was changed).