So, this is my first full month playing cash after 18-months of casually taking on the Chris Ferguson challenge with MTTs.

I was off work at the start of the month and played 1-3 very short sessions per day with some decent success, despite some inexperienced plays at times. My mind was fresh each session and 10nl seemed like it was going to be easy to crush on Stars within 1-2 months.

Since returning to work however, nearly every session has a recurring theme: I get 2BI up in the first hour (500 hands, 9-tabling) playing "thinking" poker and then proceed to become a tired, button-clicking zombie and donk the buy-ins off (and occasionally some more on top with some coolers).

My questions therefore are:
(1) What session length do others play before their A-Game starts to slip away?
(2) Are there any tricks you use to spot when you may have become a button-clicking zombie? Or tactics you use to prevent becoming too tired?
(2) How do I increase my stamina beyond one hour per night (no jokes necessary)?