It's amazing what you can learn about yourself and others based simply on the way we perform everyday activities like walking and holding a bag. Being armed with this information is not something you'd put into a resume to differentiate yourself during the job search, but it can help you improve as a person. Both understanding yourself and others makes you more likely to succeed in a team, both as a follower and a leader, and that will make you more in-demand by clients and recruiters.
This interesting video from Bright Side goes through four simple things that can reveal a lot about one's personality. Check it out and see what you learn. Are there any other small details you pay attention to in your co-workers that helps you work better with them?