How to make the most of a mediocre haircut?

I’ve recently gotten a trim, but not it looks rather like a mullet than the pixie cut I was aiming for. I’ve not enough money to get it cut again. Is there a way I can style it so that I get the sort of pixie effect? If so, what products work best? My hair is kind of oily, so I wouldn’t want to look like a grease monkey when I’m done.