It was first technique I tried to free your mind to make it as clear as possible thereafter with a piece of paper and a pen or pencil to start a glossary not worry about any order or theme or something just write the words as they come to your mind. When you have five or ten of them. Choose a word that seems to really stand out then see if there are other words that may relate to the words you choose next attempt to find objects or documents relating to your words, read the articles or materials and add to your list of words as it relates to it. When you have a thought process down, and a model to try to add your words and sentences and paragraphs.
The second technique is to look at a picture or an object just look for about 5 minutes, not to analyze or something just to see it after doing that does something for about 10-15 minutes to write activity. After sitting in a quiet area, with paper and pencil or a pen and I write all that the first word that pops into your head if the picture or object that he saw few minutes ago or activity you have done or fight even if it is something completely different, and not analyze it. With either of these two techniques would be surprised what you get.