I recently ordered new business cards in order to split off my personal writings (my fiction and my other non-business or non-client writings, such as general non-fiction, poetry, songwriting, etc.) from Open Door and my other business ventures.
Now I have two separate cards, one identifying me as an author and writer, the other for Open Door in my corporate colors. This seems to work a lot better and I suspect it will work better for the foreseeable future as well. I can now, therefore, run my Businesses and Careers as separate ventures, parallel but not overlapping.
I am still debating whether to branch off my Designs and Inventions from Open Door as an entirely separate division. That will be my next decision and step. That will be a decision primarily regarding Capital and Fund-raising. If so I will need to incorporate each division.
Also, in order to keep a steady supply of both sets of cards on hand and to meet the new demand I dispensed with my business card holders altogether and instead bought a wallet just to hold my new cards.
This also works much better.