Since I am older (in my 40:th) and have had an brain damage (stupid me) I am a slow learner. But, there is hope for us older students as well:
http://www.webmd.com/fitness-exercise/news/20070313/get-fit-improve-memory
There are in fact several such researches. So, I have tested this on my self for a while. I started with increasing the daily exercising. This actually did help me a lot. Might be that i also listen to Chinese pod when running. So, I have also added a punishment for my self. When I have a bad character session with more than 10 errors / 30 minutes i have to run/walk up and down the 21 floors in the house i live in. Today that have been 4 such runs, yup a bad memory day. This is actually helping in many ways. During the session I can practice my character in my head and i get a lot of blood to the brain so it gets much more active. This is actually helping me a lot. It is never to late to learn anything:-)