I once spent a whole day without food
and a whole night without sleep,
in order to meditate.
It was no use.
It is better to learn.

Confucius

Your task here is to imagine in as clear mental images as possible your affirmation. Then try to just as clearly imagine how your dream affects everything around it.
If you are not visually oriented and have problems with creating actual mental image, that is all right. Just think about how you will enjoy having your affirmation in as much detail as possible. Also try to imagine all the things and circumstances that will impact on your enjoyment.

The following is excerpted from Miracle Worker.

Visualize

"Imagination is more important than knowledge"
Albert Einstein

One of most powerful tools available in dream fulfillment is visualization. This is where you can break free and imagine all the wonderful things that are to be yours. Nor is this just idle daydreaming. Visualization is what puts meat on the bones of your prayer. Be passionate about having your dream and dream it in all its possibilities. Many people have given credit for their success because they never stopped dreaming their dream, no matter how remote and impossible it seemed before it was finally realized.

Visualization is what a meditation session is, but instead of using a common technique of blanking your mind, make it productive in the direction of realizing your prayer. There is no need to "project" or do any other sort of mental gymnastics. Just sit quietly and contemplate your dream. You need not be able to create an actual visual image in your mind, just have your thinking focused on it. If you suddenly realize that your mind has wandered on to other thoughts, don''t fret, this is common and normal. Just return to visualizing you dream. There is one general rule. Sell yourself on the sizzle and not the steak. Elmer Wheeler is a motivator who coined the original phrase because he realized that the mind responds best to benefits to be enjoyed, rather than the underlying dry features. Make use of all the tools available, when you visualize see yourself enjoying all the benefits of your successful prayer.

If you have real trouble visualizing or daydreaming you can use substitutes for these activities. Actual pictures or other accouterments that represent your dream will help keep your goal in mind. These are not as convenient to carry as ethereal visualizations or even small talisman reminders but will nevertheless serve their purpose. If the desired result is not a major long term project, it might also be onerous and out of proportion to the result to assemble such substitutes, but this is a value judgment that you must make. While substitutes are not efficient replacements for visualization, don''t discard them just because you can visualize and daydream without them. If available, pictures and other things can be used as an extra aid to creating more effective and detailed visualizations by having them around and visible. The idea is to use anything that will be help to you.
More help on aids under DENOUEMENT - Give Visualizations

SOME EXTRA NOTES

Meditation is a great tool for quieting the mind. If a blank mind is your goal (as some reinterpretations of Buddhism are) then go for it. Secular prayer is about reaching some other goal so more has to be done. We used meditation earlier to quiet the mind to make it more receptive to new instructions. The new instruction is your Affirmation Sheet and now we will reinforce that instruction with visualization.
This step is not an exercise in mind stilling meditation. We already did the mind stilling two steps ago as a preparation exercise for what was to come. Eastern cultures have spent at least 2500 years studying and practicing meditation so that they have developed the practice to a high degree. Eastern practices are an excellent source for information and study. All this is well and good. But after 2500 years it is the eastern cultures that are trying to emulate the west. Western proactive action is now required in this step.
Meditation has been anecdotally associated with various psychic phenomenon. Many find various eastern meditations conductive to visualization. Again all this is well and good. What is required here, and the only thing that has relevance, is using the imagination, by whatever means is easiest.