Before you set off on your print on demand journey, you should first lay out a plan of what you want your brand to be (i.e. it’s identity), what channels you want to utilise, what demographics you want to target and subsequently what products you want to sell. The easiest way to touch all of these bases in one fell swoop would be to actually design some products before starting your business. Your beautiful designs may appeal to a wide audience or a niche audience, either way, people will most likely be interested in some form. Often your design style will dictate your audience, you should begin thinking about this straight away and formulate ideas and thoughts on what channels and vehicles would best suit the products you wish to sell.
For instance, if all your designs seem to be related to films or famous works of fiction (e.g. the swathe of Pulp Fiction-inspired wallets like the ones used by Samuel. L. Jackson’s Jules character) then you would probably want to target an audience with interest in films, pop culture and perhaps art in general. Naturally these are only broad, but can be whittled down into more niche categories depending upon the product.
Furthermore, you should choose what products you want to print your amazing designs onto. This factors massively into the design process. If you wish to sell phone cases, then it is most likely you don’t wish to print illustrations of large, sprawling landscapes onto them. Carrying on with the phone case idea, you should focus on designing relatively slim, portrait scale art for these products.
Bear in mind that this is not designed as a specific roadmap and that all the examples used are not to say they are the best ideas by a long stretch, however, many of the ways to approach ideas are transferrable to other subject matter.