Q: I am staying in my same job but will be working in a new industry. I'm completely unfamiliar with it; what steps can I take to get up to speed?
A: Be curious, open to new things, and focused in pursuing the information you need.
The inner game
While your actual position might be the same, you're going through a big change, which could have resulted from a variety of factors. And your feelings about the change likely will vary depending on the cause. For example, the loss of a client will leave different feelings than an increase in responsibilities based on excellent performance. So, how are you feeling? Excited? Apprehensive? Resentful? If you have any negatives (or concerns about change in general) holding you back from embracing this opportunity, take some time to acknowledge them and move forward.
How have you approached learning other new things? Use your learning style to help guide your direction. Your steps will differ depending on whether you prefer to read about new topics, go to workshops, talk with others, etc.
This industry is new to you — is it new to your company? If not, identify internal resources available to you.
The outer game
There are a lot of resources at your disposal. Even if you prefer more interactive learning, do some reading. If, say, you're moving from retail to the hotel business, learn about the industry from books, newsletters, hotel brand websites, or consultant reports. Then when you meet people in the industry, you can ask informed questions.
Trade associations are excellent ways to meet people. It can be as simple as Googling to find options. If you live in a major metropolitan area, you can find local associations or even MeetUps that focus on your new topic.
Build relationships with as many existing clients as you can. This is your chance to ask questions using the "newbie" pass. Remember, it's a sign of strength to know what you don't know. Start seeking connections with people in non-client companies, and use those conversations to understand their needs.