Here's how I anchor the Create3 dock to my hardwood floor :)

[jerrynsr]

It's important to have a rock solid docking station to insure repeatability. I use the dock for my Home location. Before the first run I execute an initpose and the location I use for initpose is Home. I use museum quality sticky putty. Here's what I use:
https://www.amazon.com/dp/B01GEGXP0K?psc=1&ref=ppx_yo2ov_dt_b_product_details. It works great! The dock hasn't moved yet,

Before I used the putty the dock would drift over time. Now it's rock solid.

[Rebecca-iRobot]

This is a great suggestion @jerrynsr!! Thanks for sharing!