A classier kind of "hang in there" for modern times.
Available at: MimosaCards http://www.etsy.com/listing/62086462/20-percent-off-charlie-brown-tree ($15 for 10 cards
If I got one of these cards my day would certainly be brightened. What a cheery little crew of friends! Thanks anonymous future friend for sending me a note!
Via: Craft http://blog.craftzine.com/archive/2010/09/invadersletterpressnotecards.html
Available at: Nut and Bee http://www.etsy.com/listing/60241234/mini-notes-sweet-sweet-pea ($3.50)