Don't react immediately when a magical being tells you you have three wishes.
First, make sure it's not one of those vindictive ones that will purposefully misinterpret your words to give you literally what you asked for but figuratively big problems.
e.g. You ask to be the richest person in the world, so the genie kills everyone else.
Also, it might not even be a genie, but the devil in disguise trying to steal your soul.
If that's the case, go through all the motions and then when he tries to claim it, you can say, "No, I said you could have my SOLE. Of my shoe. Take the whole thing. In fact, take both. I'm feeling magnanimous."
Then you just go to the genie and ask for a new pair.
And then he gives you a piece of fruit.
Which is way more delicious than losing your soul.
Needless to Say.
Geneedless to Say.
* That one wasn't actually even about the genie, sorry.