I recently spoke with a fellow magician, that told me that talismans would only work if kept on one's person. Either in your pocket, as a necklace, in your wallet etc.
He told me this is why when purchasing talismans, you only feel the effect of it once it is in your possession. Other magicians I have spoken to have claimed that wearing one is not always necessary, and they would just chuck it around anywhere in the house.
What has been your experience, are the effects more evident when you are carrying it?