Finding a Summer Internship

As the semester comes to an end and I'm preparing for a relaxing Christmas break, I'm reminding that I must devote my three weeks off to fine-tuning my resume and applying for a summer internship. (Not exactly relaxing).

I have several ideas for internships, one being Event planning (see the link below,) however I need to develop a solid resume before I start sending it out. Any tips for resume writing when it comes to internships?

Here's the site for one of the internships I'm going to apply for... There's a detailed list of job expections for interns. I need to develop a resume that will tailor to this list.
http://www.expertevents.com/