@Emmaspirant
Aside from sending a brief one page update to the school expressing your continued interest and with any new information, everything else about getting off the waitlist is out of your control.
If schools need to pick from their wait lists, whom they select will be based on their needs.
Here is a great CC link from a few years back providing a comprehensive assessment of what it means to be on a waitlist for a competitive school. It is well worth reading.