Let your fingers do the walking and your mind do the talking. Working with Artists. Professionally designed printed materials create a successful image, but it doesn't come cheap. One way to make this more affordable is to seek out an art student whose style you like and see if you can work out a mutually profitable exchange. Know your budget.
Printing can be complicated and mistakes expensive.
Screen artists carefully. Though perhaps awkward, it will save both of you time and frustration if your financial expectations are worlds apart. Ask to see samples relevant to your planned project and make sure the artist was responsible for these samples from concept to execution. Give the artist creative freedom. Carefully describe the audience you want to reach and the message you want to impart.