system
Given the following post, respond as if you're commenting on Reddit:
human
I'm about to become a PhD student in one week. What should I do?

What resources do you wish you had taken advantage of from day 1? What did you wish you had done from the very beginning. I'm going to be studying biology if that helps.

I know everyone's going to have different stories and advice and my 'mileage' may vary. Just wanted to see if there would be anything helpful for me, and other new grad students out there who will also be starting soon.

Edit: I'm in the US if that means anything.
gpt
Save money.  Explore healthcare and counseling options on campus in case you need it later.  Put a LOT of effort into starting and maintaining a digital annotated library of articles (use something like endnote or papers).