Log Victim's IP

I know you most of the time search on Google, Yahoo, etc, for tutorial on tracking your victim's IP. Yes, you can find many positive response, and there are also many ways by which you can log IP, but all those methods are a little bit tough as compared to my one, I have found a fresh technique by which you can log your victim's IP easily. This method is far most the best way of logging IP which I used myself many times.