If we're talking about work tips (i.e., non of this is no offer stuff, but is the diff between making associates happy and having them roll their eyes)
1) dont ask questions piecemeal. Drives everyone nuts. Nothing wrong with questions, but collect them and then swing by my office when you have a bunch we can knock out in one quick meeting.
2) don't spin your wheels. If you're totally stumped or confused, tell whoever is supervising you. Don't bang your head against the computer for 2 days.
3) don't make emails excessively formal. Sometimes a formal email is expected. If I give you a research assignment and 3 days to do it, the email response should be VERY clean and well written. But if I call you at 4 and say " hey fire drill here can you check this for us ASAP?" then speed is paramount and be short and quick and not "dear x, the law of fiduciary duty was first promulgated in 1743 by The Lord Justice . . . "
4) I have never seen a summer memo or email that wasn't too long. YOUR EMAIL IS TOO LONG. ALWAYS. Take whatever your LS instincts tell you, and make it 50% shorter. Especially if working with corporate folks. Short, clean, to the point.
5) If your memo or email cites to a case or article, then that case or article should be attached to your email.
6) do not work in track changes unless specifically instructed to do so. Old partners get to work in track changes. You do not, generally.
7) When sending me a doc past 8PM, if you know I am on an iPad it's a nice gesture to send a PDF as well. Not necessary but often appreciated. Blacklines should always be in PDF at all hours unless instructed otherwise.

particulaly in corporate practice, familiarize yourself with how to run blacklines (and other seemingly stupid tech stuff that has a learning curve) as soon as possible. Sooner you do that, sooner I can use you on my team as more than decoration. I don't want you having your first experience with our bug-ridden blacklining program at 11:30pm when the documents need to get out.
9) if I give you a precedent to work from for your assignment, save it as the first version of the document so you can always blackline to it. Do not enter any changes in that first version; save your changes as a new version. This tip will make way more sense once you've dealt with firm document management systems.
10). Take copious notes on any call or internal meeting you're invited to sit in on, unless instructed OK not to. But ask first before taking notes if external in person meeting, bc sometimes it can send wrong impression to other parties at meeting.
11) always put a draft line and a document ID footer on every document you draft. It should be the first thing you do. People will grumble if you forget a draft line. It's like not zipping your fly.