Some people want to improve their powers of concentration, and even help others do the same. Perhaps some members of this forum have found useful techniques they would like to share. One thing that fascinates me is how the subconscious comes to the rescue at times. For example, I make a mistake when I write something, due to lack of concentration, which is usually caused by fatigue or emotional stress. Then in the middle of the night I wake up realizing I made a mistake. Hopefully it is not something too serious, which I can correct easily. Obviously our brain keeps on working on problems even when we are asleep. This is well known. At these times we are physically relaxed and we have reduced sensory input. No doubt these are important factors. I wonder if psychologists who specialize in such matters have come up with a proven method for inducing a waking mode in which we can focus our mind to the maximum possible extent. I know drugs such as Ritalin are sometimes prescribed, but I am looking for a purely psychological technique which has been verified to work under controlled conditions. I have heard of, but not tried, technology that uses feedback techniques which attempt to put the brain into a certain mode. If there is something that actually works, could it be used in schools? It's been a few years since I've done any kind of teaching. But now I'm becoming involved in education again. I know these are not new questions, and maybe educational technology is way ahead of me. I look forward to replies.