Sleep helps tremendously. Last night, I slept over 9 hours and, today, I felt very focused. In fact, I still do, I assume because I took Concerta later than usual, around 10am.
My brain seems to be on fire today. I had a few good ideas and made several interesting connections, which is unusual, although perhaps usual on 9 hours of sleep. The only downside I noticed is that I spent a long time working on something unimportant. I got so absorbed. And I was fascinated with myself for being so focused and able to solve problems.
So, the lesson is to focus on what's important. And, first, to set a daily agenda!
Tonight, I will try to sleep at least 7.5 hours so that I have enough energy tomorrow and can see if sleep helps as much as it seems. If tomorrow isn't productive, then Tuesday I will try another 18mg.