Fighters Handbook - Chapter 12:
The Fighters of Zanra Marsh are renowned for their cool disposition in the face of danger. People say they're born with ice water in their veins. But the truth is, nobody's born with that kind of cool. You've got to train it.
How does one do that, you ask?
The same way they do. Going out into the marsh and doing pull ups over crocolisks!
Take your time and break them up over a few days. You really really don't want to burn out in the middle of a set.
Do 100 pull ups. Check off a box for every 10 you complete.
Assisted pull ups count too (no shame in relying on your comrades).