Building a library of stories.

Having a small group of stories that you understand well, can tell in different ways, and use to explain a variety of things is one of the most important tools that you can have going into a job interview. We can think of this as building a library of stories that you can go to and grab whatever you need to communicate your experience.
Here are some key stories to get you started.
Which moments from your career are great examples of a time that...
... you made a mistake.
... you solved a problem.
... you were a great team player.
... you had to cope with pressure / stress.
... you had to deal with conflict.
...a time you supported a colleague.
Positive stories. As a general rule, positive stories should be from as recent as possible. The more recent an experience is, the more it helps to explain who you are as a professional today.
Negative stories are also important. These are best chosen from further back in your career. This means that you've had time to learn from these experiences and grow past making these mistakes.
... you faced a challenge and how you overcame it
... you showed leadership
... you a time you set a goal and accomplished it.
... me of a time you went above and beyond.
... you managed several tasks at once.
...a time you communicated well with others.
Here's a task to get you started. Building your library will require you to think deeply about the things that have happened to you through your career. I recommend taking a notepad, or opening a blank document, sitting in a comfy chair, and setting aside an hour. So, why is this a good idea? The fact is that remembering the highlights of your careers is difficult. This is because we generally interact with our memories in two ways, when we make them and when we remember them. When we make memories, we make them in the context of where we were and how you were feeling. Because of this, we usually remember things better if we're in the same place that the memory was made, and feeling the same things. So sitting at a computer trying to remember these stories can be really difficult. Instead, trying to remember what it was like sitting at your old desk, or leaving work after finishing a particular project for instance, can help to remind you of these stories.
If you want to develop this idea a little more, try giving your stories names. Your library is there to help you when you don't have the perfect answer prepared and ready to go. What this means is that, when you need to rely on your library you'll likely want to find an appropriate story quick. By giving your stories names you give yourself a way to quickly sort through them and eliminate, or identify a suitable story for the question you're answering. A story's name could be the place it happened, the project you were working on, or a person who was central to it. If you are talking about a time that you helped a colleague called Dave, then that could be "The Dave story". Or that time you spent all night trying to learn how Microsoft Excel works, that could be "The Excel story".