i don't remember who it was, but at least one member here had a habit of copying entire books of the Bible.
when it comes to learning, i think the more of your senses you get involved, the better you retain the information. repeated reading, writing, speaking, singing, listening gets your eyes, hands ears and lungs involved. highlighting verses gets your hands involved too, and adds to the stimulation of your mind through your eyes -- and keeping portions of the scripture in your thoughts throughout the day keeps your mind involved, so they become 'hidden in your heart'
keeping a journal of thoughts about what you read, underlining, scribbling notes in the margins, all these things help too.
repetition, repetition, repetition