For this meeting, our first as a group since being chartered by Laney Graduate School(!), Desiree DeLeon (Sanchez + Young labs) gave us a hands-on tutorial about what pseudoreplication is and how to avoid it.
Check out her presentation here:
https://github.com/Data-Science-for-Scientists-ATL/Pseudoreplication
Desiree also shared an excellent RMarkdown document she put together that walks you through examples of pseudoreplication and how to handle it statistically using R.