To juice up your holiday letter, I recommend a little spritz of catnip to the letter or envelope prior to mailing. When the letter arrives at homes with cats, it will be attacked and, most likely, drooled upon. Because my last name is Purrington, it just seems like the right thing to do. And sending psychoactive drugs through the mail is just a great way to support the US Postal Service. I bought the bottle at Amazon, FYI. In past years I’d just use my home grown stash, but the powder is messy and gives its presence away — I like the stealth nature of the spray.