Some people are happy to have a one-man operation that generates $60k in annual revenue, requires less than forty hours a week of maintenance, and lets them work from anywhere in the world.
I've heard these kinds of businesses referred to as "solopreneurship," "micropreneurship," "microISV" (specifically for software), "lifestyle businesses" (often the pejorative VC term), and "profitable businesses."
Recently I've found a couple of podcasts that have a ton of information on these things, and they're quite fascinating. I've been able to learn a lot about online marketing and product creation just by tuning in during my daily commute or jog. (Fair warning: These podcasts are aimed more at programmers looking to launch startups, so if you don't know much about software, they may not be your cup of tea.)
- Startups for the Rest of Us The host of this action-oriented show says "We want to make a podcast that makes you want to take notes." Topics include "How to learn marketing without having a product" and "Service providers for new businesses."
- Lifestyle Business Podcast If you're enamored with the idea of running a business from a laptop on a beach in Thailand, this is the podcast for you. It's also the least technical of the three I've listed here.
- Tech Zing This is more of a free-form discussion and can wander off topic at times. However, though it doesn't have as high a signal-to-noise ratio as the others, the host is able to snag some impressive interviews, which end up being the best shows.
The sheer number of podcast options out there can be overwhelming, so I've found it best to listen to a single episode first, and if you like it, go from there. If this kind of stuff interests you, I suggest starting with TechZing's interviews of Rob Walling and Patrick McKenzie of Bingo Card Creator—who would have thought you could build a business around selling custom bingo cards to school teachers?