I was reading an article in a blog and read this part:

If you’re reading this, you’re probably a productive person. Maybe you love to find more efficient ways to get things done. Or perhaps the thought of being effective and reasonably powerful when it comes to enacting change makes you feel warm and happy inside.

On the other hand, if we don’t feel like we’re productive, we can really start to beat ourselves up. A lack of productivity is something we may instantly and rigidly identify as the enemy. This becomes a problem when we’ve simply taken on more things than we can reasonably accomplish, for example. It is difficult to accept that we should let some things drop, or delay our productivity, so we attempt to become hyper-productive.

A common outcome of a hyper-productive lifestyle is what I call “productivity exhaustion.” The symptoms are very similar to depression symptoms: Fatigue, negative thoughts about self and others, lack of interest in life, and so on. I first measured and discovered this effect in my own life as I completed a variety of professional certifications and examinations, all at the same time. After documenting my experience, I set about finding ways to overcome this kind of outcome in the future.

The Document:
https://www.marccarsoncoaching.com/files/depression-exhaustion/Depression-and-Exhaustion-Log.pdf

How much interest do I feel in things in general? (Work, friendships, hobbies, minor tasks, TV shows, websites, books, physical fun, etc.)
1 2 3 4 5 6 7 8 9 10
0 = No interest at all. 10 = Vibrant sense of interest in the world.

How much physical/body strength do I currently feel? (Physical illness, headache, muscle tension, any dull pains, etc.)
1 2 3 4 5 6 7 8 9 10
0 = Impossible pain and/or lack of strength to lift a finger.
10 = Overflowing with strength.

How much positive emotional energy do I feel? (Excitement, idealism, readiness, etc.)
1 2 3 4 5 6 7 8 9 10
0 = Completely down and stuck.
10 = Absolutely vibrating with positive energy.

How forgiving of myself am I today? (If I fail it’s OK, if things don’t work out it’s not all my fault, etc.)
1 2 3 4 5 6 7 8 9 10
0 = Extremely harsh.
10 = Completely forgiving.

How much will my circumstances change in a potentially fun/interesting way today?
1 2 3 4 5 6 7 8 9 10
0 = No change in circumstances expected (same place and conditions, no outside inputs or changes).
10 = Huge change of circumstances that will definitely usher in positive mood changes.*

I found the idea fascinating so I tried to log the results at different times. 

With time passing, and me logging my productivity exhaustion again and again I noticed some interesting lessons. 

First lesson:

The interdependence of each factor to the other. Let’s say I didn’t get much sleep and because of this I feel tired and not fresh, this causes my positive emotional energy (third question) to feel low. 

Let’s say for whatever reason I’m super happy, this causes me to feel energetic even if that day I had very little sleep. 

Let’s say I have too much work to do. This causes me to feel tired and negative, even if I slept a lot and didn’t work much cause I just started.

Second lesson:

Difference of mental states between different states/results. Depending on the total result of my productivity my whole mental state changed. Below 10, I was tired pessimistic, had low motivation for everything, and doubted every idea/project that I started or wanted to start. 

Above 40. The most enthusiastic person ever. Optimistic. Future-driven. Outgoing. 

But as seen statistically both these extremes are rare so I try to keep my energy levels optimal. 

Third lesson:

Big picture/long-term view. If I worked one day like crazy, the next day I would be tired. So I tried to find an optimal way of working everyday or most of the days as much as I can without sacrificing the next day.