Additionally, some of the items you keep on your desk may not be appropriate for the workplace, such as political items or documents with sensitive information.
Whether your place of work is cubicle, corner office, or open layout, here are nine things you should never keep at your desk:
You may think it's wise to eat lunch at your desk, when in fact, it could actually hurt your productivity.
In a 2015 NPR article, Professor Kimberly Elsbach of the University of California, Davis Graduate School of Management noted, "We know that creativity and innovation happen when people change their environment, and especially when they expose themselves to a nature-like environment, to a natural environment."
"So staying inside, in the same location, is really detrimental to creative thinking. It's also detrimental to doing that rumination that's needed for ideas to percolate and gestate and allow a person to arrive at an 'aha' moment," Elsbach said.
Unwashed coffee mugs lying around can add clutter your workspace.
"It's best to take a minute and leave your coffee mug in the kitchen immediately after usage," Valli Vishnubhotla, digital PR manager at AW Media, told Business Insider.
"Although everyone is entitled to their beliefs and opinions, your work colleagues may take umbrage to your political viewpoint," business coach and entrepreneur Eugene Gamble told Business Insider.
This can lead to unnecessary work tension and conflict. Gamble suggested keeping your political views separate from the workplace.
Laura Small, vice president and people director at advertising agency RPA, told Business Insider that workers shouldn't leave out paperwork regarding any legal proceedings they may be involved in personally or at work.
"It's more information than your colleagues are entitled to," she said, and could reflect negatively on you, even if they misunderstand it.
This may be the most difficult for people to get behind.
"Most of what's on our mobile devices are distractions from what will propel us forward," Judge Graham, executive leadership expert, author, and entrepreneur, told Business Insider.
"I favour the old fashioned landline!" he said. "It allows me to be contacted for business purposes only, therefore only allowing my phone time to generate value for the business."
A study published in the Journal of the Association for Consumer Research found that your phone's mere presence can distract you, even if it's on silent or powered off.
Avoid keeping cookies, candy, or chocolate at your desk if you're trying to stay healthy.
"It's far too easy to go into autopilot and keep munching while you're diverted by a task, especially during the usual early-afternoon slump," Ben Taylor, founder of HomeWorkingClub, a resource for remote workers, told Business Insider.
"Whether you work in an office or at home, keep the high-calorie snacks in the kitchen or the break area, so you have to make a special effort to dig in," he said.
"Unless your company has announced a mass layoff and you are certain that your position will be eliminated, having a resume visible for everyone to see sends a clear message" that you are looking for a job, Roy Cohen, career coach and author of "The Wall Street Professional's Survival Guide," said.
If your boss were to see it or hear about it, it could break their trust, which is hard to earn back, he said.
Nobody wants a strong-smelling workplace, and some people may have allergies or prefer a fragrance-free environment.
"Plug-in air fresheners are a fire hazard and can be very distracting to your coworkers," Jenn Watterman Moore, business consultant and coach, told Business Insider. "What you think smells great maybe unpleasant to your neighbour."
"A toothbrush or mirror tucked in a drawer is fine, but leave the tweezers, nail clippers, deodorant, or major makeover supplies at home," Small said. It can diminish how you are perceived professionally.
Also from Business Insider South Africa: