They have to start with:
You might be a Redneck IF:
....you steal firewood from your neighbors woodpile.
....you've ever taken flowers to a date, that you stole from a cemetery.
...your wife is larger than your pickup truck.
...the primary color of your truck is Bondo.
They can be your own as well.
I like this one:
You might be a redneck if, you think that family reunions is a good place to pick up chicks.
Or this,
people stop at your house, thinking you're having a yard sale.