soak up as much as you can about real design and don't allow your entire body of work to be a product of the tutorials you've done.
as soon as you can do more than a flier or mixtape cover, and have it not look like a flier or a mixtape cover your stock as a designer goes up.
graphic design has existed a lot longer than dafont.com, photoshop brushes and bevel & emboss and it pays to learn how to do shit with respect to the history of typography and composition.
if you design, respect what a photographer dedicates all their time to learning and pay them or have your client pay them to do what they do. if you're a photographer respect what a designer does and pay them or have your client pay them to do what they do. same with copy writers, video directors, etc.
that jack of all trades, master of none shit is fucking up the game. once you know how shit works in a real life production environment, educate your clients so that you end up with a quality final product.