If you want to set yourself up for success in a new job, make sure you're on top of your game from day one.

Amanda Augustine is a career expert and spokesperson at TopResume, a résumé-writing service. She has over a decade of experience coaching professionals.

She details the steps that she's seen successful people take in the first week of a new job.

Click here for more BI Prime stories.

Starting a new job can be nerve-racking. The stakes are high: You have to prove yourself, become acclimated to the culture, and make a good impression.

So how important is that first impression?

It's actually critical — and there are certain action items you can consider from the start to position yourself for accelerated success.

"The first three months of any new job are an extension of the interview process," said Amanda Augustine, a career expert and spokesperson at TopResume, a résumé-writing service. "From the first day, you need to be on your game."

With more than a decade of experience advising high-level professionals, Augustine details what the most successful people do that first week in a new job.

Be a geek about introducing yourself.

Take the initiative to meet people. Say hello in the elevator, kitchen, or bathroom.

"It could be a fast-paced culture, and they don't have time to come to you," Augustine said. "Start with the group that's closest to you, the people you're directly working with."

It will be in their best interest to get you started on the right foot, since your work will directly affect theirs.

Befriend a veteran who can help you navigate politics (and find the pencils).

Learn who the players are, and who's been at your company awhile, Augustine advised. Find the battered veteran who has a good handle on what works and doesn't and can show you around.

"Companies have their own language and inside jokes," she said. "Look for the one person to help you decode the acronyms and office politics."

Plus, you'll need someone to go to for the silly things. Asking your boss where to find the pencils is a bit below their pay grade.

Set expectations with your boss and employees.

"Get on your boss's calendar," Augustine said.

Use that initial meeting to establish what they believe success will look like in the first week, month, and three months.

At the same time, if you're in a managerial position, it's important to begin setting expectations with your direct reports. From communication style to office hours, that first week sets the tone.

Figure out the coffee situation.

Figure out the unwritten rules of the office, like how to use the coffee machine. Jorge Silva/Reuters

Learning where the coffee is will always be a good strategy for success. It's also important to figure out the unwritten rules of the office that, if violated, make people go ballistic. Who washes the dishes? Which shelves are communal?

"In our office, there are several refrigerators, and people get upset if you use the wrong one," Augustine said. "Be a sponge, and watch how people are doing things. There's nothing wrong with asking how to use the coffee maker."

Start demonstrating and documenting what you sold the company on.

"Whatever you sold them on in the interview, make it your mission to demonstrate that you're going to do it," Augustine said.

If you said you were a social media whiz or good with numbers, immediately start revamping the social accounts or making sense of the company's analytics.

Start a brag sheet. Keep track of all your accomplishments, major contributions, and when you get positive feedback. You want to get in the habit early and have the information at the ready for future performance reviews and salary negotiations.

Get organized to set good habits.

Especially since a lot of new information is coming your way, setting good habits and getting organized from the start will make your life easier down the line. It's also a good time to improve your bad habits.

"It's a great opportunity to overcome any challenges or weaknesses from your past,"Augustine said.

If you've struggled with time management, for example, use that first week to map out how you'll spend each day and begin putting it into practice.

Reinforce your new connections on social media.

Once you're officially on the job, it's important to update your title across your own social media platforms and also start following your new company and colleagues.

As you meet new people, cement the relationships by finding them on Twitter or LinkedIn. Augustine advised identifying the platform that makes the most sense. Facebook, for instance, is viewed by many as personal, so use discretion.

Reconnect with former colleagues.

Perhaps counterintuitively, Augustine said the first week of a new job is the perfect time to reach out to colleagues from your previous jobs.

"Go back and reconnect with people at your old company, and ask for LinkedIn recommendations," she said.

The best time to get referrals is when you're not looking for a new job, she said.

Find your go-to pharmacy and take-out lunch spot.

Learn your new neighborhood. Do you know where the nearest CVS is? What about where to get a sandwich, take people for coffee, or have a nice business lunch?

"Logistically, you need to know where to go get a Band-Aid when you need one," Augustine said.

Jenna Goudreau contributed to an earlier version of this post.