Create a pseudonym for each type of writing. If you're worried about brand confusion with your different types of writing, follow in the footsteps of Nora Roberts, Stephen King, J.K. Rowling, Joanna Penn, J.A. Konrath, Lawrence Block, and Joyce Carol Oates who all, for various reasons, decided to publish some of their works under an alias in order to differentiate it from the writing they did under their own names. The upside is that it's easy to separate your writing (just give each pseudonym its own Amazon author page, Twitter account, Facebook page, etc.) so that each audience is its own. The downside is that you then have to maintain each personality and you split your audience. For some people this might be ideal, but the idea of maintaining two or more of each type of social media account feels a little daunting!

Write in different mediums. If you have an interest in different types of writing, perhaps you can tackle each type of writing with a different area of your interests. For example, maybe you focus your short stories on your comedy writing, your novel efforts on your sci-fi and fantasy interests, and your screenwriting on your action/thriller interests. The upside here is that it's really easy to focus on your audience into each niche because you're only dealing with one kind of audience for each kind of writing. The downside is that you actually have to be interested in lots of different types of writing; there's no sense in taking up screenwriting or epic poetry or short stories if you're simply not interested in those mediums.

Point your audience to a central organizer of your choice. If the existing structure of a site (like Amazon and its author pages) doesn't work, consider creating your own place where you can organize yourself in your own way. Maybe that's a place like here on Writing.Com where you have folders you can create. Maybe it's your own personal website where you have pages and headings for each of your areas of interest. Either way, if you can create an alternate place where you can organize your writing however you'd like, you can then point the other places (your author page, your Twitter account, etc.) to that central page where everyone can go and easily navigate your work to find their area of interest.