Simply being aware that there exist things that you don't know you don't know can save your project.
This is the general basis for why I tend to pick tools & concepts that are at least a half-decade old. The space of unknown unknowns in something that has been around this long should be vanishingly-small, especially if we are applying the tool or concept in a typical way.
But definitely give it some times to think of it upfront. Weight them by 2 factor: severity and frequency. Then try to tackle as much as you can from the top list of severity * frequency level.
This is the general basis for why I tend to pick tools & concepts that are at least a half-decade old. The space of unknown unknowns in something that has been around this long should be vanishingly-small, especially if we are applying the tool or concept in a typical way.