09. Don’t say: “Can you have this done by tomorrow?”

Why? Graphic design isn’t an instant process that is done with a few clicks of a mouse. Every project will have its own process and time requirements. Realistically, some designs can be whipped out in a day, while others will take much, much longer. It completely depends on the project (and the designer’s creative process). If you’ve found a designer you’d like to hire, let him or her know about your time constraints and ask for a realistic estimate on how long the design will take.