Well, after going a bit with the lowercase "i", it doesn't seem to make much of a difference, except that it reminds me that i care. What i did notice quite a bit was, how much "i" showed up in every few sentences. It seems to show that i think surrounding me, with me being the most important person, rather than just a contributor to life, like everybody else. The trick then, would be to write sentences that skip the word "i" altogether. In its most simplest form, instead of, "I think we should go to the store", it would be "perhaps we should go to the store".
But, sentences are merely a reflection of internal thought. So, it would seem, it is the internal thought process that must be changed, and then the sentences will change by themselves. But changing internal processes takes practice, and perhaps rewriting sentences *is* the practice that will do it.