I do software and system architecture, and I'm generally responsible for creating original content. In order to make any progress on deliverables, I have to be calm, have my memory loaded up with all the necessary context, and have just the right level of stimulation--too little and I fall asleep, too much and I'm wrapped around the axle.

I'm much better in the mornings, so I wake up early, 4 or 5AM, and I spend some time reading interesting technology stuff. Then I start casual reading on the task, not really trying to work on it, but just loading my brain. I set up my visual workspace (I have 3 monitors because visual context assists my shitty memory.) After an hour or two I reach a point where I can really focus and make great progress. I guess it's a way of getting into flow.

But a morning meeting that isn't directly relevant will wipe most of that prep away, and then I have to start again. So I avoid early meetings like the plague, unless it's purely an exercise in optics and I can ignore it completely and continue working.

When I'm medicated, it's way easier. I can direct my attention and it is resistant to distraction. My short-term memory doesn't keep reloading on every stimulus. I can get into flow in a reasonable amount of time throughout the day.

I'm off medication last few years, but plan to go back on in the next year. I love the cognitive benefits, but I have a couple of the rare side effects.

Thanks for replying! That's all very interesting to hear. I am much like your explanation but just considered that to be "normal". Maybe I should explore the medication options I've been signposted to after all.. I once experimented with modafinil and it had similar effects to what you mention.