When I decode my image stream I record my image stream on the left 2/3rds of the page draw a line to seperate. Then I look for key words in the image stream starting with the nouns. Like sea and then think of all the meanings associated with sea (not dictionary ones - mine)
I also check what verbs I used eg tall and strong, rigid, snail paced -I found that they often are appropiate words that descibe the situation that I am decoding on.
I also notice what feeling certain images brought up... if it makes me feel cold or uncomfortable - that is often also how feel about the situation.
The end of my decoding I write a statement that would answer my question. When I do the for my HTT questions I write the answer before even looking at the question. It is often quite insightful and predictive.