From the book How I Learn Languages by Kato Lomb:
This method, however, has a great advantage. It is you who have compiled the glossary — you have personal experiences associated with it. The terms on its pages crop up in your memory embedded in the context of your self. They recall the setting where you encountered them, the time, and sometimes even the mood in which they were jotted down.
I recommend untidy glossaries with all my heart to everyone. Neatly inscribed lines with uniform pearly letters are like desert landscapes. They mix together and make you sleepy; memory has nothing to cling to. We gain firm and steady footholds if we write with different instruments (pen, pencil, or colored pencils) in various styles (slanting, upright, small letters, capital letters, etc.). The advantage of a glossary, thus, is its personal nature.