It’s a simple, but important lesson.

When it comes to getting the most out of your job, you need to focus on your strengths and your weaknesses, says Ryan Shafer, founder and CEO of Shafer & Smith.

“The best managers are those who don’t get into their job as an ego, as a power trip, as anything else,” Shafer says.

“They are all about the value of their company and their customers, and the people they care about.”

So how do you become the best you can be at your current job?

Shafer has a few tips for managers to take advantage of.

“There’s nothing wrong with asking a question or two,” Shaffer says.

Ask questions like, ‘What’s my biggest weakness?’ or, ‘How can I improve my communication with my customers?’

Or, ‘If I have a complaint about a particular person, how can I address it?’ or ‘What would I do differently if I had to deal with this?’

“Get in the habit of asking yourself these questions, and then applying those questions to your own work.

Because you’ll know what to look for and how to spot it.”

Read MoreRead MoreShafer < Smith is an HR consulting firm and its clients include Fortune 500 companies like General Electric, Cisco, Facebook, Cisco Systems, Amazon, IBM, Apple, Google, Dell, eBay, HP, Intel, Netflix, Intel Health, Microsoft, Netflix Mobile, Netflix Sling TV, Pandora, Samsung, Samsung Smart TVs, Target, Target Home, and Walgreens.

Shafer has been featured in Forbes and TIME Magazine.

Follow him on Twitter @RyanShafer.