1. Silence your social media. In the beginning, step away from Twitter, Instagram, Facebook, and all your other networks. (When you share that viral video, it carries a time stamp.) And quiet your cell too, says Alexandra Levit, author of New Job, New You. Moms have a way of blowing up your phone in week one.
2. Get in early, stay late. "At least in the beginning, try to get there 15 minutes early, and stay about 30 minutes later than your boss," says Anita Bruzzese, author of 45 Things You Do That Drive Your Boss Crazy. Thankfully, face time is less important than it was in the past, at least in some careers. But in a new job, it looks bad to zoom out.
3. Project competence. You may not realize it, but body language—and actual language—speaks volumes. "I've worked with people who didn't give enough thought to how they spoke—saying things like yeah, uh-huh, um—as well as offering limp handshakes. It all can translate into immaturity," says Rebecca Widness, founder of Widness and Company Public Relations in New York. Being super-polished with little things like your posture, your outfit, or the way you answer your phone can make you appear (and actually be) more confident.
4. Sip, don't swig. It's never a great idea to get blitzed with coworkers, but definitely not in the very beginning. Laurie Ruettimann, an HR consultant in Raleigh, North Carolina, recalls how, in an effort to keep up with the guys on her team who took her out to dinner after her first day at work, she helped polish off six bottles of wine. "I ended up puking at 8 p.m. and had to get up the next day for meetings," she says.
5. When in doubt, don't. Not sure if you should wear that skirt? Don't. Take that long lunch hour, even if it's a slow day? Don't. Always respect that squiggle of doubt, Lindsey Pollak, author of Becoming the Boss, says, "especially during those crucial first few months on the job."
This article originally appeared on Cosmopolitan.com. Minor edits have been made by the Cosmo.ph editors.