I have to admit at first I thought it was a scam: because Google is offering stickers free, if you send them a SASE. That's right, an old-school, 1980s-style self-addressed, stamped envelope (you'll only need a regular 42-cent stamp in the U.S., by the way). But it's on the official Google blog
(and I double-checked by clicking through from Gmail). And what a cool offering to make your New Years' organizational process more fun.
Included in the free package: a sheet of the glittery Gmail icon stickers; three bookplate stickers; and a sheet displaying Gmail shortcuts for handy reference.
Now, to find a sufficiently fancy envelope. I'm thinking a nice little note to the engineers responsible for this project are in order!