(Photo Credit: UHDL/Flickr)
1. Having weird or messy hair.
Depending on where you work, a mohawk might be totally appropriate. What's not appropriate? Anything that makes people go, "huh." That includes obvious wigs and combovers, and anything straggly or unclean looking. It's the 21st century. There's no need to be ashamed of a receding hairline. Just keep your hair clean and groomed, and you're all set.
2. Wearing a lot of scent.
Cologne is not as good as a shower. If you want to smell nice, you can't beat the scent of soap and water. Also, the longer you use a particular scent, the more used to it your nose becomes, meaning that although you can't smell yourself, everyone else can. It's hard to get promoted if your boss is too busy trying to outrun your cloud of Drakkar.
3. Not dressing like your boss.
Take a look at the person you report to. He or she should be your model for dress. Sure, a lot of places have more stringent dress codes, official or un-, for management. But if you don't want to stay where you are for the rest of your time at the company, you'll want to step up your game.
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What are the worst grooming mistakes you've ever seen in the office? We want to hear from you! Leave a comment or join the discussion on Twitter.