In the comments on my post about getting your first industry job, Dr. Confused asked for some advice for people who have landed the job, and are now facing the transition from an academic workplace to one in industry. I don't have a great deal of advice, and of course different types of jobs in industry will have different requirements. But I think I do have a few things that are generally applicable.
1. Get a non-work email address
A lot of academics seem to use their work address for personal email, too. This is not done nearly so often in industry. Very few companies forbid it outright, but it isn't seen as a professional thing to do. Also, you have no expectation of privacy in your work email. Yes, your boss can legally read your email. So keep the personal stuff out of it.
2. Get your own computer
A lot of companies provide their employees with laptops, and some people then treat those laptops as their own. They are not. They belong to the company. Again, you have no expectation of privacy. You may also have signed something that implies that any work you do on that laptop belongs to your employer. I've heard differing opinions about whether or not that would actually hold, but... why try? Get your own computer for your non-work use.
3. Expect a lot more meetings
A lot of grad students and postdocs are used to working on their own project in near isolation. They might have a lab meeting to attend, but no need for weekly meetings to organize project work, since the vast majority of the work is going to be done by one person. Most industry projects involve collaborating with multiple people, and that leads to meetings. If you're coming in at a PhD level, you may find that people expect you to actually run the meeting, too. Learn how to do that effectively. It isn't too hard- the key things are to have an agenda and to write down decisions and email them out after the meeting. As you get more experienced, you'll probably learn how to steer conversation and cut off time-wasting dead ends. But maybe not. I am continually surprised by the number of people who don't know how to run a meeting. If you learn how to run a meeting, you will stand out and people will be impressed. Really.
4. Expect more attention to timelines
This is not a universal thing, but it should be! Start up companies have a limited runway. They need their projects to follow timelines, because if they run out of money before the project finishes, they fail. Bigger companies are often trying to push a drug into the clinic before some deadline- again, projects need to follow timelines. This can be a really, really hard transition for academic scientists, who are often under the erroneous impression that you can't have firm timelines for research projects. You can- you just manage towards decision points rather than end points. The fact that this is such an issue sort of puzzles me, since grants have limited duration and specific aims, but I have watched many, many scientists come in and stumble on this point, so I think it is worth mentioning.
5. Respect other people's time
Show up to meetings on time. If you say you'll do something by a certain date, do it, or at least tell people ahead of time if you discover that you cannot. Since projects are collaborative, other people are organizing their work around you. Don't be a jerk and screw up their plans. This will get you a bad reputation and make it harder to find the next industry job. And yes, this may mean that you'll need to get better at estimating how long it will take you to do something. This is a skill that improves with practice, but you can also try finding someone who does similar work and is good at making estimates and asking how they do it.
6. Assume Everyone Knows Everyone
I don't know about other industries, but biotech is a small, small world. Since companies go through boom/bust cycles, people move around a lot, and meet lots of people. Even if you think there is no way that Jill Chemist would know Joe Biologist, it is an extremely bad idea to say anything negative about Joe unless you want to put your reputation behind that assessment.
Those are the big things that come to mind. If I think of anything else, I'll come add it. Readers with industry experience- what would you add?