You can A) spam your content everywhere through social media sites, eventually people will notice.
You can B) be more selective to who it is you give your art away to and render your services for, with specific communities, such as this forum and websites such as Deviantart, being examples of places where people will appreciate this type of service and be more likely to return to/remember you later.
You can C) create a work that has all the characteristics of something that will be popular, and if it hits the right note, it will be popular regardless of the actual quality of the product itself.
You can D) Be tactful and tactical about it, sneaking in references to your book, comic, etc. naturally through carefully placed and disguised plugs.
I hope that helps you,
-Pablo, Author of INTERMINUTE