S.H.
totally "get" your Wed sale....one more "thing" about StL! Love those Suburban Journal ads! When I lived in StL, if I was off work on Wed, I'd hit the sales....
the other posters have had good ideas. Here's a few more things: post a "Not Responsible for Accidents" sign. Include your name & date on it. Display it prominently. I usually have it on my checkout table.
Have lots of plastic groc bags & some newspaper for bagging goodies.
Have a ready supply of quick, easy foods/drinks handy.
Always think safety. Keep the house locked.
As Cheryl said - have lots of small bills/coins. I usually have $40-50 in ready change. Keep the $$ with you at all times.
Clearly price everything, & have it all setup the night before. No matter what time you post for opening....you will have early birds. We've had customers the night before! & of course, the neighbors shop the night B4!
I always have a "free" box.....people love it! I've also been known to just randomly give kids/elderly people freebies....it's such an uplifting experience to see the smiles & heartfelt thanks...& the surprise on the parents' faces is fun, too! In fact, I've been known to grab a shovel & even dig up surplus specialty plants for people! Drives my family nuts....
Good Luck with your sale!