Pokemon Go

So recently Pokemon Go came out for a select amount of countries, but if you manage to install the game on your phone somehow, you can just play it everywhere in the world. 

I've tried it out for a bit, walked about a mile with it but i've found nothing yet. So thats why I was wondering if anyone has some special tactics already to get pokemons and other stuff. 

I would be a shame if i was walking around for hours and it turns out im doing something wrong :P