As a screen printer, t-shirt printer or sign maker, the time will come when you will have to 'get creative' and draw some original art. As an example, your customer may want a unique custom drawn element in the t-shirt design or the sign you are making for them.
While you can 'farm this out' to a third party to do the artwork for you, it would be useful (and fun) to be able to create the art piece yourself.
Below are some drawing tools and tips for beginners that would be useful for any screen printer who is not an artist.
ASPA Staff and others