And if you are too cheap to buy 1 book (even though it appears you have already bought several), here's a web site that groups over 6,500 commonly used Japanese kanji into phonetic categories:
http://www.kanjinetworks.com/
Statistically, around 80-85% out of over 50,000 characters have phonetic markers. Many textbooks quote this figure, so I would assert it to be true.
I will still recommend reading the book I mentioned earlier, if you can, because it gives a specific method for remembering the characters using phonetic markers, unlike the web site, which is simply classifying them.
http://www.kanjinetworks.com/
Statistically, around 80-85% out of over 50,000 characters have phonetic markers. Many textbooks quote this figure, so I would assert it to be true.
I will still recommend reading the book I mentioned earlier, if you can, because it gives a specific method for remembering the characters using phonetic markers, unlike the web site, which is simply classifying them.

) - I couldn't agree any more with you. I write out each kanji I learn from Heisig's method multiple times and then move on; however, I use scrap pieces of paper instead
.) In fact, I would highly appreciate it if you would continue to give us information about it on a more regular basis. *May I suggest a blog to prevent a discussion everytime you post something?
A system based around phonetics is certainly an intriguing idea.