<p>As a current Wesleyan freshman, I can honestly say that Wesleyan admissions is not like that of other schools. First off, you don't have to stress how smart you are. Everyone here is smart, graduated very high up in their class, and probably had a 4.0 GPA. That's why it's one of the best liberal arts colleges in the country. So if you're applying here, it's basically already assumed that you're very intelligent--you don't need to tell the adcom about it.
What you want to highlight in your application are extracurriculars. It could be hobbies, talents, projects, trips, clubs, performances, whatever. These are what makes you stand out. I haven't met one person here that is <em>just</em> smart. Everyone has at least one thing that kind of defines them and makes them stand out. Find out what your thing is, and let the admissions committee know about it. Don't be shy.</p>