This is a guide on how to get all 90 stamps for Mario Kart 8. You'll need to get some work in, but thankfully, you won't have to memorize too much.
See, once you get the game, 28 of the stamps are available to play with from the get go. As for the remaining 62 stamps, they're tied in to each of the playable characters and each of the tracks.
So, unlock the character stamps by getting 1st place on any Grand Prix. To unlock the track stamps, you need to beat an EAD developer on that track in Time Trials mode, by beating their ghost.
Easy to remember right? Good luck beating one of those devs though.
Mario Kart 8 will be available tomorrow, May 30, on Wii U.