Test it's limits first.

You wonder about a couple of things. First, do you actually have to always use the words "I wish" or not. You decide to try giving yourself some new power for your test, so you say out loud: "From now on I will be untouchable. Impervious to both physical harm and the law." Then, as you realize how unpractical this test was, you notice a police car passing by. You quickly wish it had a flat tire. Surely enough the two police officers stopped and came out wondering what was going on. As they were inspecting for anything that could have possibly caused their situation, you come out of your house running and start throwing rock at the police officers and insulting them. They very quickly stop you and try to arrest you but as soon as they enter you name and address in their on-board computer, they free you and start apologizing just as if you were the all powerful ruler of the world -which might just be, you thought-.

Well now you know you don't have to respect any specific structure to use your power., and it doesn't matter whether you said it out loud or not. Now you want to know how much power you have over things.

You head to the bathroom and get naked. Your parents had a very large mirror in there that allowed you to see your whole body quite easily. You thought it was time to see if you could modify things and people and you thought you were the best subject to test this. First you wished you were taller and you got taller; you were now 6'4", which was a height that suited you. Then you wished to be muscular. Nothing exaggerated, just enough to impress girls and to earn some respect from the football team. So you got about two hundred and forty pounds, and it was mostly muscle. You looked at yourself and couldn't help to compare yourself to Christian Bale, but only taller. It was satisfying for now, but then you noticed how your new body made your cock look small. Well you would have gotten to that eventually so why not now. You've always wanted a monster cock; something even the black porno actors you saw in movies would be jealous of. So you thought about lengths and sizes and decided to go for something impressive right away since you could modify it later if you had to; so you got yourself a fourteen inches long by three inches thick cock. You got yourself the sort of cloths you've always wanted, took a shower, dressed up and went downstairs.

While you were eating breakfast you wondered if you could influence people into doing anything. Your mother told you to make sure to get to school in time and then left for work, leaving you alone with your little sister. You though you could try your powers on her, but then you wondered if she wasn't a bit too young. what if it traumatized her for life? Once you finished your breakfast you headed out and went to school. On your way there you managed to get an answer to your last question about your power. After witnessing a meter-maid dancing tango with a hobo, a guy you hated french kissing his dog and the mailman acting like a duck; you understood that you really had unlimited power.