If you have a garage or shed, move your items you are selling on Craig's List there before having strangers come over to your house. Don't list your house number in the ad, just your neighbourhood, and maybe the closest corner. I sold several items, including my car, successfully through CL and never once had anyone in my house or aware of my house number (fortunately, my mom's house is on a corner and had a huge rose bush out front). Create a junk email address to use just for CL, too just to keep it out of your regular email, and because you will get ridiculous offers (someone offered me $300 for my 1997 Chevy Cavalier in excellent condition when I had it listed at $1100!)
I'll second the newspaper ad thing - use the small local paper (we have one called advertiser) as well as the major town paper. It'll cost a bit to put ads in both, BUT it's so worth it. Then, put signage out. Post signs in local stores, on lamp posts, etc. and the day of put a day-glo sign on your street corner (and if you're in a development, directional signs from the entrance). and post your yard sale to Craig's List, too. And other local online communities. You never know.
Don't go for community-wide yard sale days, but do offer to share with a neighbour (especially if they'll go in halves on the ads!)
I'd list things on Craig's List first, too. Like, if you have a complete dinner service for 4, try selling it all together on CL first. At a yard sale, a lot of people are only interested in buying pieces they might need, and you might get a better amount trying to sell it as a set!
The most important thing on CL and eBay is pictures. Take photos outside in natural sunlight if you can, try to focus only on the item, and crop out anything personal from the photo (you don't know how many eBay ads I've seen that have a cat in the background!) Laying things out on your bed works, too.
If you have good looking clothing, consider taking them to a consignment shop. you won't get as much as if you sell it on eBay, but you'll get more than a yard sale price for it and the shops often will have an option where if your items don't sell within 3 months, they donate them to a shelter automatically. But watch out for rip-off consignments shops. a 50/50 split or 60/40 is good. 70/30 is not. Some consignment shops only work in seasonal clothing though, so if you have a lot of winter clothes, you might have to hold onto them until August to consign.
Oh, and don't forget the UKY classified ad section. You never know, you might find a UKYer who wants what you have

Good luck!