Know everything about the organization
The first impression is the final one. When you are new at a job, especially when it is your first such experience, you have to ensure that everyone realises your competence. One of the most effective ways to do that is to stay in touch with all the happenings of the office, whether they are related to your particular niche or not. One way to do that is to set up a Google News Alert so that you stay in touch with all the developments at your organization.
Know about the competitors
You also need to be aware of the developments in the companies which provide competition to your employer. It will help you to form a strong opinion and provide inputs when the need arises.
Be realistic about your capabilities. Never commit to something which you cannot do.
Stretch the meaning of hard work
You have to be willing to take that extra yard. Show your managers and bosses that you are exactly the one they needed and become an asset for the company.