<human>: Summarize the given text in a few sentences.

This is a problem, I think many of us redditors have. Many of us are seemingly intelligent, but cannot use what we have, due to either lack of discipline or lack of knowledge how to learn big masses of information, which we can retrieve from our memory when needed.

In my opinion knowledge is the greatest good of all. But I have failed University. I am now in an ICT apprenticeship and only due to my friends and working besides University, I'm not in that much debt. I'm not a native English speaker, so please forgive my, probably many, orthography mistakes. 

I haven't had problems understanding the principles and the logic in neither physics nor philosophy. But I couldn't remember enough to get through the exams. 
It has become more and more evident to me that I  lack learning techniques. Further I lack discipline.

I currently dabble around in music, write a book, and many other unfinished business. I tried to learn Latin, Chinese, and French.

All the learning technique sites I have found are either for kids (gifted or slow-learner) or seem to be a scam.
Does anybody of you know sites or books, that are useful. I would be great if the techniques were based on the newest discoveries in Neuroscience.
Also I would like to learn working techniques that keep efficient.

I considered to go to a psychologist for advice but reddit could do even better, because here there are a myriad of opinions and enough knowledge, so that I can do this myself. Plus some others may could take the information in this thread to improve themselves, too.
<bot>: I want to learn learning techniques and working techniques to improve my knowledge in music, literature, physics, languages and science.