I start well, but lose concentration after 2-3 years. Any tips for rebooting in the middle of a session?
Depending on how long are your sessions.
In my case, I have 5-8 hours sessions. I use to start after lunch or a meal.
Before I start, I fill my bottle, and sometimes I prepare a snack, in order to pick it up quickly during a break. I also have my mate ready.
I use every break to go to the bathroom also.
During the sessions, if I feel I lose concentration, I try adding more tabes, or I watch something in the background, or I check what's new on Cardschat.
Also, if I'm playing at few tables, sometimes I use the gaps between
hands to stretch. That makes me feel more relaxed.