1) If you could have anything you want but your worst enemy would get twice as much as you..
wish for half of the full and honest truth about yourself.
2) If a genii grants you three wishes..
first wish for genii powers with no negative side-effects, then wish for the genii to have only the powers of an ordinary human, and since he still owes you a wish, have him spend the rest of his life helping people avoid fraud to make up for fooling others.