Easy, I'd curse every existing position of power so that those using them couldn't lie or evade direct questions. Lets see what happens to the world when corruption becomes impossible.
Addendum, I do this not so much for the good of man kind as out of spite, People so utterly stupid have no right to power.

 

First I'd figure out how to become immortal and invulnerable, after that I would enjoy an eternity of just fucking with everyones head.

 

IF VOLDEMORT COULDN'T DO IT WHAT MAKES YOU THINK YOU CAN

I would probably use it in a perverted fashion.

 

Cause Voldemort is an absolute moron and I'm not a complete moron.

 

Well if I had magic I would definitely get rid of stupid people to help with the overpopulation, kill a few religious fanatics, fuck some girls, smoke some weed and cause some mass chaos. It'd be fun.

 

Would you abuse your power (love potions, imperio), go evil (killing sprees, just mass chaos) or will you use your power for good (truth serum? eh good is boring)?

I would probably abuse it by using obliviate and imperio to influence the people around me, rig the presidential elections, conjure up a quill which could do everything for me.


What would be the first thing you would go and do.

Erase the character Ginny Weasley from the book Harry Potter so that my eyes won't be hurt by Harry!Ginny Fics anymore every single fucking time I go on FF.net

 

Be careful with this wish, this can backfire on you. The fangirls of those fics would probably move to some of the better charecters.

 

Fuck the idea of erasing Ginny I make Rowling rewrite the whole damn series, having Ginny die a horrible death in the process, and give me a slice of the profits.

 

Ya, and get rid of the weasley family, they're just a bunch of poor bastards who can't do anything right.

 

Ain't that the truth.

 

Five words:

Imperio! have sex with me.

 

I would take an orphaned one year old child and nurture it into my unwitting pawn which would then break free of my control and inherit a thousand billion galleons and spend it all on a trunk that solved the plot's inherent lack of scope and would answer every difficult question of the story by randomly spewing letters written over 16 years ago by prophetic mothers-

Sorry, almost gave you the amazingly original plot of my fanfiction there.

 

If I had magic? I'd build a Tardis. It wouldn't /have/ to fly in time, but as a space ship, it's pretty cool. Especially if I could make it Apparate.

 

Have her die in the Chamber. That would simultaneously prevent Ginny-sue, show Harry that he isn't invincible, and make the surviving Weasels hate him.

 

That works, simultaneously revealing to Harry that the wizarding world are a bunch of fickle bastards as well.

 

If fanon is to be believed they'd probably send him to azkaban too.

 

Hence why Harry pulls out of Hogwarts and goes to durmstrang learns the dark arts and takes over Egypt.

 

Why Egypt? Why not some other cool country?

 

Because Egypt is the coolest country ever (I put it in Italics to show how cool it is).

After America anyway. Because Xyphanesia Arabellimuss Snape-Lupin-Dumbledore-Granger lives there, and she's the coolest, cleverest, most beautiful person in the Harry Potter series.

Seriously though, why not Egypt? Must be some pretty snazzy and shiny stuff in those wizardy tombs.

 

Why Egypt? In HP, magical power grows with age. Some Egyptian ruins are over 5000 years old. The wards on some of those tombs must make Hogwarts look like tissue paper at this point.