Do have a theme:

Don’t offend your neighbors:

When is a lynching an appropriate decoration? The answer would be NEVER!
Do have fun:

Don’t go overboard:

Was there a closeout sale at the Tacky Inflatable Decorating Imporium?
Do get creative with your pumpkin carving:

Don’t puss out and just paint your pumpkins:

If your mommy won’t let you play with knives, then get a grown-up to help you.
Don’t be clueless as to what you are trying to copy actually looks like:

I think those are supposed to be spider webs, but it looks like snow or an unfortunate cotton candy accident.
Don’t confuse Christmas with Halloween:
Seriously? A Halloween tree!?
Don’t fly a cute flag:
Just don’t:
Aw, what the hell is this!?:
No, no, no!!
I can’t stand when people confuse Halloween decorations with Fall/Harvest decorations. It’s either one or the other, people! There is nothing scary about flowerpots! Boo, my ass! The pumpkin isn’t even carved! Sheesh!
Here endeth the lesson.