Regardless of what business you're in, there's one skill you need to thrive and survive: sales skills. Now, "sales skills" doesn't strictly apply to selling products and services. It also applies to how you conduct yourself on a daily basis. You must be able to 'sell' yourself, that is your skills and personality, to prospective employers, coworkers, and customers alike. Otherwise, they won't know what you offer, what you're capable of, or what you can do for them.
If you can't sell yourself, then you probably can't sell anything else for that matter. You must be able to pitch yourself before you attempt anything else. If you can, several opportunities will arise, and all you have to do is be yourself.
You can read more in the article from Inc. here.