When considering your custom apparel design, an important factor you might overlook is the colour of the shirt. While white shirts are least expensive, they are not the best selling for printing. Some independent studies have shown that red ink on black is actually the best seller for custom Screen Printing on T-Shirts. But does that coincide with your company's colour scheme? Something to consider.
If the company's focus is on kids, then for your prints, you might decide on pastel or bright colored shirts. Kids happen to love bright colored apparel and will be more likely to favor it over blander colours, which will help keep your company in the foremost thoughts of their parents. Think of your audience and the focus of your company or organization.
If you have a slogan or USP, would it be appropriate for the custom apparel? This is an extremely subjective question that only you can answer. For instance, for a cleaning company or moving company, it would be very appropriate. But for more of a conservative real estate company, the logo might be enough. Then again, a real estate company might want to stand out with a bold statement, so it really depends on the direction you want to take with your advertising and promotion on custom t-shirt printing.
What if you are a new company and don't have a logo designed yet for promotional t-shirts or for any purpose? What if you have no one to do your custom t-shirt printing design for you? These days anything can be found online. Need a designer? There are literally thousands out there. You just have to put the time in to find one right for you.
Once your design is set, you'll need to decide on the type of custom apparel you want to have done. You can either screen print the shirts, heat transfer, direct to garment print, or print with special effects like distressed printing. This is the washed out type of look you get that is presently very popular on custom Screen Printing on T-Shirts.