There are some mistakes that are common. People write "cite" instead of "site", or spell "hummus" when they mean "humus". These are the kind of errors that are easy to miss, even when reviewing your paper multiple times. Often students are reminded that they should go the extra mile with grammar and spelling, but putting that advice to practice is difficult. Reading sample college admission essays provide an opportunity to observe not only which errors might be most common (and thus, things to look out for), but also to appreciate the importance of good grammar and provide enough willpower for yet another read-through.
In addition, following are links to a couple of sample essays from the Kit:
Undergraduate Applicant. Sample college admission essay.
Post-Graduate applicant: Sample Personal statement essay.
Sample College Admission Essay Questions | eHow
Sample college admission essays give applicants a chance to figure what to write and what to avoid. For example, a student may wish to write about a particular hardship in life which he or she has overcome. If the hardship is truly a unique test of spirit, it will reflect well in the paper; if it's a lackluster and common event (like breaking a leg during a ski trip) it may actually hurt the applicant. It's hard to see the line when you're only looking at your own idea. Reading sample admission essays give students a chance to image themselves as the judges of others' essays and ask questions like: does this sound persuasive and does it stand out above the crowd?