It’s not an easy task to find a job nowadays. So when you do get called for a job interview you have to make the best impression. There is one easy method of doing this: dress for it.

I know very well what you are thinking: “The business world has become so casual—people wear flip-flops for goodness sake! Workplace attire doesn’t matter anymore.” Incorrect! How you dress says a good deal about you and how you feel about your career, and potential employers certainly notice.

So, follow this straightforward rule for any job interview: err on the side of overdressed. Even if the company you are interviewing for has a relaxed work environment, when you show up in jeans and a sweatshirt you’ll make a bad first impression. Dressing up means that you respect the interviewer and take the position you are interviewing for seriously.

Then there is the workplace itself. If you work in a casual environment, one in which formal business attire is not required, you can still dress for success. This will likely seem obvious, but always wear clean clothes. Resist the urge to throw on last night’s jeans. Try to always think about the clothes you are wearing, something that looks good, or is business casual clothes. Looking sharp will set you apart as a professional.

Of course, you still have to be a good worker. You can be the best-dressed person on the planet, but it will not help you if you don’t do your job well. All things being equal, the better-dressed employee will always make the better impression.