Top Law Schools

If I plan on applying for a clerkship a few years out and I want to get a recommendation from a few professors while I'm still in law school, what's the procedure for keeping those on file for when I apply a year or so later? Do I ask them to submit it to OSCAR and just let it sit there?

This is probably a question for your school's clerkships coordinator/career office/whoever handles these things. At my school, you would have needed only to get the professors to agree to write one, but they would not actually write it until you initiated the application on OSCAR.

It may be best if they write them now while their memories of you are still freshest and then update a few years down the road when you're applying. At my school, the clerkship office would keep them on file, but it probably varies.