I personally want to change how our planet is. But it would take me alot of time, and all the time I spend on it might not actually have an effect. Having my own planet is a different story though.
I would be the supreme ruler of the planet. Don't worry about dictatorship. I don't need power, as I already own the planet. My assisstants will help me and take decisions on my behalf. I would ensure that everyone is treated equally and there should be peace within the place. Anyone who dares to defy the rules, must go under severe punishment even after second chances are given. Anyone who commits crime will be banished from entering the planet again.Since character is first and then competence, discipline and obedience is very important.
Nature will always be taken care of. No one can harm it or illegally destroy it. Those who do, will face the wrath of their life. New plants must be planted every month, to ensure the oxygen level stays put. Only renewable energy is used in the planet, so no harm done to the environment, hence no pollution. Recycling is always being practiced,so none of the materials get wasted.
Everyone should get educated, no one should be left behind in academics. Health and fitness is also important, so exercise is a must. All basic facilities will be available to everybody, no matter what. This may be too much to have in a planet, but it is my dream to have such a planet in real life.