You should work on your essays, put together your resume, any supplemental arts preparation should you plan on supplying them (arts portfolio, audition files, etc.) make the list of colleges you want to apply to (mix of reaches, matches and safeties), take or retake any SAT/ACT, and ID the teachers for requesting the LOR’s BEFORE the school starts, i.e., this summer, and create packets for these teachers. Otherwise, your fall semester would be lot more stressful.
As far as I’m aware, no schools ask for both teacher evaluations and LOR’s, so I’m assuming it’s the same. In any case, you should think carefully about which teachers to request LOR’s from. These teachers should, preferably, be the ones who know you the best (and hopefully like you) and from whom you’d gotten good grades. Ideally, you’d want to request LOR’s from teachers in different fields, i.e., in humanities/social sciences and science, etc.
What my son did during the summer before his senior year – after having done all of the above – was to send an email each to the teachers whether they’d be willing to write the LOR’s. Once he had received their approval (gauge the tone of their email responses carefully. If any “red flags,” you might want to reconsider), he sent them a follow up email letting them know that he’ll bring a “packet” of relevant information to each teacher shortly after the school starts. This way, the teacher can continue to enjoy his or her own summer break without having to be disrupted and without being surprised by the unexpected LOR request when you show up in his office in the fall.
My son’s “packet” consisted of: 1) short cover letter detailing what his goals are and how the LOR would help him get there; 2) resume-like list of his EC accomplishments beginning with his academic stats (GPA, class rank, SAT scores); and 3) the list of schools he’s applying to WITH the LOR deadlines in bold.
When the school started in the fall, with all these things accomplished already during the summer, everything just went very smoothly. My son had given his teachers a plenty of time to think about how they want to write him the LOR’s, and they were expecting him to show up in their offices with his packet.
Lastly, don’t forget to thank these teachers and the school guidance counselor once the final application is submitted. A small gesture, often neglected, can go a long way.