Perils of being a freelancer

We're now into the second half of the year but I haven't been paid for -ANY- of the big projects that I've completed since March. This is, despite my monthly automated reminders which I send out to the project-owners.  

Maybe I should send people the following email: 

Hi? It's me, Lisa. Remember me? There's this thing I like to do. It's called eating and putting food in my belly. I'm not sure if you like it as much as I do, but without food, I tend to get cranky, tired and hungry. Surprising, right?
Pay me now before I hang a pig's head on your office door! Kthxbai. 

Seriously, thank god for regular clients and savings. (This is why it's so important to have a six-month emergency fund, people!)