Well let's see...
There's a list around in the forums here some where that list a gazillion classified ad sites.
I'll see if I can locate the link to those and post them here. I've been meaning to find that list any way, so now I have no excuse not to.
There's traffic exchanges and I like EasyHits4U rather well.
They give you a free splash page maker too that is pretty good.
It's a good idea to set up a free blog. Blogger or some such as that.
You just got to dig in google. Do searches for free text ad exchanges. Basically the things I stated in my tips posted.
If you want to try your hand at paid advertising, some members use AdHitz which is owned by ClixSense.
You only pay for actual click thrus ad I think someone said you can pay as little as $2.50.
Personally, I think it's good to dig in google. Ya never know what you'll find. When I say dig, I mean really dig, not just the first page or two you see for keywords like 'free advertising'...skip around, go deeper in the search.