Craigslist Post Optimization?

Does anyone know the best way to write craigslist posts for optimal click through?

Here are some of my questions:
How many words?
Any characters in the titles?
How many links can any one post have?
Are any categories better than others?
Should I use caps in the title?
Is HTML postings better? If so do you have a template?

Let me know if anyone has any tips.

Thanks

There's a CL forum on here. It's a lot harder than it looks.

Thanks, just saw that. I'll go there first.