R.I.P. Scout26
Like Ben said put it in a zip loc bag. You can put that zip loc into a larger bag with a damp paper towel in it. Did it come in a cellophane wrapper? Or a glass or metal tube? Those will keep it pretty fresh.
Doesn't Monica Lewinsky have a cigar care and use blog? If she doesn't, she should.
QOD, was it wet or just damp?