You will also want to keep your affirmations as short as possible. We talk too much as it is, and when it comes to affirmations we need as few words as possible. Potent words. Soulful words. Words that we can repeat with as much force of our wills as we can generate to stream a current of power into the belief we are creating. That way the Universe has to take notice and respond ASAP.
It's curious that people who believe in a LOA are critical of those who don't and believe them to be close-minded. I have presented a lot of new data such as the erroneous science and the data showing that acting as though you had already accomplished your goals was detrimental to you doing so. Yet, LOA proponents do not look at this with an open mind and reconsider their belief system. In this way LOA is akin to a faith-based religion, except that religious beliefs can't be disproven.
You claim that "positive thoughts always resulting in positive things" is not the basis of the LOA. In part you are correct. The foundational basis in science, as I alluded to in the article was that thought stuff particles travel through ether (not air) and interact with formless stuff to create whatever it is that you are thinking about. This was how "the law" started.
Have a strong desire. Now we know where we’re going and we need something that energizes the vision. If you’re flying to Hawaii, you know that plane needs fuel to get there. The same works for your vision, you need the right fuel so you can manifest it. Have a vision that moves you and each time you think about it, you feel lighter and joyful. These are the emotions that will get you where you want to go. Dare to dream and think big, it will help you to literally energize your vision.