I was putting together a website with e-commerce functionality for a big launch. I was well ahead of schedule with the website's functionality, but hadn't received any content. The day before it was due to go live?
Client: I'm sorry, I'm still waiting on the logo and all the copy.
Me: Look, I'm ready, but I'll need to make sure it's all in place before we go live or you won't have a website.
Client: Is there any chance you can just whip something up?
Me: ...No. I'm not a graphic designer, and I'm not a writer.
Client: How hard could it be?
Turns out, that attitude was the reason I didn't have anything to put on the site... because he hadn't paid the designer or copywriter yet.
And then, surprise! He didn't pay me for six months.