One mistake I often used to make at Justin.tv was offering a potpourri of business models (virtual goods, product placement, chat ads, contests, etc..). I was embarrassed to say Justin.tv would monetize with advertising when clearly that was the only answer. Own the simple business model.
In a moment of randomness, I've came across this newsletter issue by @tomcritchlow on getting more client work.
Now that I'm refocusing on indie-ness, I realize this is something I do whenever I seek work: posting on socials, emailing former colleagues, and texting friends. https://t.co/JjwBEFGI3G
Along those lines, I believe that mechanics design is a distinct discipline separate from both interface design and product management. I believe it deserves its own terminology, principles, processes, deliverables, and bodies of knowledge.