[tptacek]

If you want to run your business suboptimally in the hopes that it will attract your first clients, that's fine, but you shouldn't do so while pretending that it's the right way to run a business. I have a hard time thinking of clients who are particularly well-served by, say, 3-hour billings. Customers that need sporadic work like this are probably far better served by retainer arrangements. If you find yourself doing lots of 1, 2, and 3-hour projects, you should consider a staff augmentation arrangement instead of project billing.

For the most part, I think all consultants kid themselves about how productive they are juggling multiple projects in a day. It's not as if this is some great insight on my part. I'm a developer; I've read all the same stuff as you. I just paid close attention to the stuff about getting "in flow". Re-read Joel Spolsky's "Fire and Motion" essay.