There is so so much good stuff in this article. A++ content. Incidentally, my hunch is that one way to build trust with clients is to write articles like this. I can tell you know what you are doing if you can write something like this.

> I’d estimate over half of freelancers disappear before delivering their projects. Good for you: Finish your projects and you’re already in the 51st percentile of freelancers.

This matches my gut as well and I've been somewhat shocked at how many clients compliment me on answering my email in a timely manner! Clients seem to understand almost any mistake you can make if you are upfront about it and work with them to solve the problem and don't disappear. Though, I definitely agree on being very very careful about code that charges money (or sends email for that manner).