I pick up place mats, napkins, & napkin rings with a theme. Add a centerpiece and I'm done.
I agree with Mogie, Pinterest has them all... But it depends what kinds of table setting are you talking about? Any specific theme such as fall or winter?
Here’s an idea where I made a Lazy Susan and then did a dollar store fall table scape. https://www.hometalk.com/43613772/make-your-own-oversized-chalkboard-lazy-susan