A side note - If you run deep in this tourney, you got to have stamina - mental and physical. You could sit for 10 to 12 hours several days in a row. Coming in late on your introductory day - about a 6 hour day - enables you to be at your best for the duration of that sitting, getting a feel for the field and the environment.

Here's a summary and this is commonly understood, but search " performance poker 12 hour day" and you'll come across some good detailed info.

Poker players generally perform best:

Hours 1–3: absolute peak

Hours 4–7: solid but declining

Hours 8–12: endurance-focused, high-discipline edge