If you haven't heard about Pokémon GO yet, then you've clearly been living under a very heavy rock, so check it out now.
The main restriction with Pokémon GO at the minute, is the inability to download it in certain countries. At the time of me writing this, it's only available in the U.S., Australia, and New Zealand. So as I'm in the UK, I can't officially download it from the App Store.
Unless, I was "american".
So the way I got around it was to go to appleid.apple.com, and create a new Apple ID which was based in the U.S. You can get a random U.S. address from this generator, which will then let you create an account.
Then you will have to go to the App Store app, then at the bottom of your screen, tap on your current Apple ID and choose Sign Out.
Then sign in with your newly created U.S. Apple ID, it will prompt you to change to the U.S. App Store, which you can confirm.
Once that's done you can download Pokémon GO simply by searching and finding it on the App Store, and because it's free you won't need any payment details on the account.
When the App is installed, you can then sign out of this account in the App Store, and sign back in to your real account.
Then open up Pokémon GO, and start capturing!