I use many methods. I have tried almost all the method listed about and I am still doing more experiments on these method. Personally I think NLP (neuro language programming) and PSR have very high potential to increase our learning ability.
I tried to open some energy gates in my head , namely 3rd eye chakra, crown chakra (bai hui), eyes, ears, temples, throat using simple chi gung and also love energy channeling method (I discovered this method in my experiment) and turn out that I can understand my German lecturers?lecture VERY well. Charging my throat chakra somehow makes me speak better.
there are certain points on your head.... when you focus on them it brings certain effect. I read that if you imagine an orange hanging on your head, slightly behind your skull, you can read much faster....
making your eyeball look upwards somehow produce alpha waves and it is good for visualisation.
I hope this helps.
Thanks for sharing