In Pokémon GO, Pokéballs are never enough, especially if (even with the special case reported in this news) you are not good shooters: fortunately there is a simple method to retrieve thrown and failed Poké Balls. When the thrown ball bounces off the grass away from the Pokémon you are trying to catch just a tap away on it to retrieve it. The trick doesn't work 100% of the time, but it will definitely save you a lot of Pokéballs.