How Do You Know When It's Too Much Too Little?

The idea is that you need to be able to respect those limits. People tend to romanticize this sort of like, push your limits, keep going, keepand but it's a hard question to answer. How do you know what your limits are? Other than you crash and burn, and then you figure out not to do that next time? The most useful word i can come up with isa caring. You want to care for your elf in the process.