Over-stimulation of Imagery

Using images and symbolism in order to engrain a new way of thinking into our heads is one of my favorite approaches. It works better than just telling yourself to do something. It also is a lot more interesting and can become very creative. For example, imagine a samurai, in full garb and sword drawn surrounded by enemies. He is however next to a koi pond and cherry blossoms are flying through the air. He is not in a tense fighting stance, but standing calm and relaxed, and smiling slightly. Now that is peace in the midst of chaos. Be the Samurai. Don’t stress, don’t prepare once the battle has started, just do.
Depending upon your ability to imagine, and your familiarity with the concept of peace in chaos, this could be a very good image to bring to your mind in the middle of stress. Pictures carry a lot more weight than words at times, and bring in one more of the senses in order to try and connect the person we want to be with the one that is.
Images are also used for creating passwords. Imagine a tree, next to a boulder, next to an oddly bent light. The password is ‘tree.photon?’ where the light is shaped like a question mark. Now this could be made as complicated as you like.
However, this method is becoming weaker and weaker. As you go throughout your day you are going to run into countless images. Many will be normal, billboards with a face on it, but others will be odd drawings or graffiti. The problem that poses for us is that it makes each individual image more difficult to remember. The brain naturally partitions things as important or unimportant, as standing out or plain. The more images you have running through your head, the less any one of them can take up significance or stand out.
Using images to spur us on towards success, becomes less and less effective. I have no application, just an observation. I am sure the over stimulation of images has other affects, but I can’t think of any at the moment. Do you have any ideas?