Feliway

Feliway really does help settle a new cat into their environment! I don't know where you're getting this cat from, but particularly if it's an adult this will help them feel "at home" more quickly. I believe it's a synthetic analogue of a feline pheromone. The diffuser will last about a month, which should be long enough for most cats to acclimatise to their new home and personal assistant (that's you)