Recommended · for some experience
Digital Electronics: Debouncing a Push Button Switch (SPST)
Why people recommend it
Explains hardware debouncing of switches with an RC network feeding a Schmitt trigger inverter, part of a series people cite when cleaning up clock inputs.
Watch for: Watch the previous video in the series first for context
In their words
This helped me with your suggestions on debouncing, too:
Ben on electronics.stackexchange.com, Aug 2014. CC BY-SA.