I found it is important to learn to recognize when you have hit your limit. There will be signs that you are hitting your limit. I have mentioned these in another thread. Getting glassy eyed, having to ask for something to be repeated, realizing you have been hearing but not understanding, rereading a line or two of text, and plenty others I can't remember right now. Overdoing it one day can result in serious struggles the next day.

So, having a 30 minute conversation on Monday can cause you to struggle to have a 5 minute conversation on Tuesday.

It can also be too many voices in the conversation.

For a reason unknown to me and anybody whose research I have read, there seems to be a system that allows one to over-exert successfully to a point far beyond normal then have a total crash the next day. This conundrum can be confusing by making you think you are getting better then you suffer a horrible crash.

It just reinforces the need for a measured recovery period. It is not about what you do on your good days. It is about how bad you dip on your bad or undisciplined days.