system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What do the U.S. Supreme Court Justices actually do during a regular work day?

I don't mean "What is the role of the Supreme Court in general", but what does a Justices day look like?

Do they sit in some library with stacks of old books, looking up various laws relevant to their current cases, or do other people working for them do that and make reports? Do they all show up at the Supreme Court Building every morning? Are they sitting around in some boardroom, discussing official things every day?
gpt
A big part of what they do is deciding what NOT to decide on.  Tens of thousands of cases are submitted to the supreme court every year, but they only have the time to decide on a handful.  

Many that are submitted have already been decided on, and the justices generally know they're not going to change their minds this time.  Others haven't been presented in a way that would set enough of a precedent for the issue. 

It takes time to review each submittal to the supreme court and decide if it's worth pursuing.  Then they take the shortlist and review it even deeper before deciding which cases to actually hear in the next season.