Where Are You?

My tendency to omit small words while typing is happening more often and is becoming a real pain. I have to read and re-read everything to make certain that I have all of the 'I's and 'the's that I had planned on. Or needed. I 'speak' all of these words in my mind. I hear them all quite clearly in my brain, but somewhere between my brain and the typing fingers, they disappear. Where do they go?