Hey Jason!
That's a good question. There are a number of things you can do if you've been waitlisted...none of them
guarantee that you'll get in or that your chances will be dramatically improved, but they can all help to convey your interest to the school.
Start by checking out this post on our LSAT and Law School Admissions Blog:
http://blog.powerscore.com/lsat/i-was-w ... -now-what/
Probably the most important point on the list I mention there is to start by reading the waitlist letter you got carefully, and doing exactly what the school asks you to do. If all they ask you do to is send them an email telling them that you're still interested, stick to sending them email, and refrain from sending a ton of additional information. If they say sending an essay is what you should do, then do that. Respect the school's wishes, and you'll automatically rise above the many other waitlist applicants that
didn't listen and sent in 5 additional letters of recommendation, two new LSAT scores, and a 3-page essay on why they would be the perfect fit for the school.
If the school doesn't really say to do anything, then you have a little more leniency in what you can do. Still, the mantra here is still "less is more." Don't think that the more additional information you send, the better you will be. Remember that you're not the only student that the admissions office is working with, and you don't want to overwhelm or annoy. Stick to a letter of continued interest (LOCI), an updated résumé (if anything
significant has changed in it), and perhaps updated grades (if your spring/fall grades weren't available when you applied). Out of all those things, the LOCI is probably the most important.
Another thing you can do is keep in touch with the admissions office via brief monthly emails restating your interest and keeping them abreast of any changes in your contact info. Again, less is more here. Do not send weekly emails, and resist the temptation to call and "check" to see where your file is. The idea here is to keep people informed, but not wear our your welcome before you've even been admitted.
I hope that helps! Let me know if I can provide any further guidance. Best of luck!