Couple of mundane (non-data-based) suggestions plus a weird one.
Ask your wife about your behavior. (Although this could open up a can of worms (or emotional whuppass) especially since she's probably twice as tired as you are.
Just be regular in your self-awareness. Check in on yourself more frequently. Awareness can access data you could never formalize.
Memorize something that's intricate enough to not to become automatic and repeat it to see how sharp you are at the moment. Each morning I count my stomach crunches with the first 1000 digits of pi. The first couple of hundred do tend to get automatic but I can judge by my ease with the last 700 whether I'm going to have a good brain day or not. (I told you it was weird.)
Ask your wife about your behavior. (Although this could open up a can of worms (or emotional whuppass) especially since she's probably twice as tired as you are. Just be regular in your self-awareness. Check in on yourself more frequently. Awareness can access data you could never formalize.
Memorize something that's intricate enough to not to become automatic and repeat it to see how sharp you are at the moment. Each morning I count my stomach crunches with the first 1000 digits of pi. The first couple of hundred do tend to get automatic but I can judge by my ease with the last 700 whether I'm going to have a good brain day or not. (I told you it was weird.)
Congratulations on the new baby.