I have this question:

When do you create mind maps? During your reading or after reading?

Here are two views I have found:

"Mind maps should be prepared after the student has fully understood the article. Beware of the student who reads and draws the mind map at the same time. The structure of the mind map just follows the sentences and paragraphs of the article and the student inevitably ends up using the article to make the presentation rather than the map.
" http://langue.hyper.chubu.ac.jp/jalt/pub/tlt/00/mar/sh_cribb.html

and

"Instead of simply reading a book on some topic, next time try using a mind map while you read. Just draw your central word and then begin reading, everytime you read some idea that strikes you as important or interesting, just add it onto your mind map in the appropriate place."
http://qsilver.queensu.ca/~phil158a/memory/mindmap.htm