Hi blwegrzyn, looks like you are off to a good start! I'll try to answer some of your questions.
Any method (like the astigmatism wheel you linked to) may or may not work for everyone. I would suggest practicing it for a few days and write down your observations of what you see. You will observe for yourself if it helps you. In fact, that is how you can approach any of Bates's methods.
When my vision gets blurry I simply close my eyes and try to relax.
Does that help your vision? If it does, that is great, do it as often as possible, not just when your vision gets more blurry.
Do you have a Snellen chart or a calendar that you can look at daily? Some people don't get a clear flash, but experience gradual improvement to vision. For me in the very beginning I noticed my improvement because every day I could move a few inches further from the chart to read the top line or two (I started around 5 feet and found I could move back, inch by inch).
A chart is an easy way to get feedback about your vision. Read it every day for a week or two and just write down what lines you can read and note the lighting conditions and your distance from the chart. Some lines will be blurry and barely recognizable. Don't stress out about whether or not you are reading letters or just recognizing them, just write down what you see and the quality. You will notice that some days you see better or worse than others.
Over time, though, you will have a good idea of your visual range, and you will be more confident to use the chart to help you actually improve your vision. This is done by looking at the chart and just mentally noting what you see. Then you will draw your attention to relaxing in some way, whether through deeper breathing, a pleasant memory, or whatever. Then look at the chart again, at the letters that you read before. If relaxation has been successful, it should be easier to read those letters, see if they are darker or clearer. If after this, or during this relaxation, you notice that the letters are darker and clearer, then that is direct feedback that your relaxation was successful. It's not a competition to read the next line, or to read the lowest line ever in your experience. The point is to simply compare what you see before and after the relaxation. If you can read the next lowest line, that is great! But do not rush to do that, first look at the same letters that you could see before. With a little awareness of your thoughts and actions and vision, you will quickly notice what you do or think that makes your sight worse, and do that less. And you will notice what you do and think that makes your vision better, and do that more.
Doing this once can bring a slight temporary improvement to vision. Doing this every day brings permanent improvement (it's how I improved my vision).
see my vision diary blog: http://sorrisi.wordpress.com
After 8 months: 20/50
now, 5/10, 10/20, still improving and loving it