I agree with what you said, about "Only a whole in the wall will be left." I have come to realize that we spend too much time trying hard to do things that we believe will get others to remember us by. People should spend more time enjoying each and every day, appreciating every moment instead of wasting so much time trying to do things that others may never even remember about us after a few year of our passing from this world. Please, understand that I am not saying that you should not try to do some of the things that you would like others to remember you once you depart from here. My point is for us not to over do it. We should be careful not to be obsessed with the idea of being remembered while neglecting to enjoy the little things in life, such as family, friends and simply the little things that bring us joy.
If you live a life where you try your best to enjoy each and every day and most of all spread a little bit of that joy to others where ever you go, as well as living a life where you try to uplift others and bring a little sun shine in their lives especially in time of needs is more than trying to do the so call Big thing that we may think that will stick in the mind of others.
The little things such as a smile, a hello, or just calling someone when they are down are usually the things that we will be remembered by. I know that is true for me. In a time of my greatest need, the things I remember the most was the prayer of a former church sister who didn't have a car. She was unable to visit me and my family, but she would call each week to pray with me over the phone in order to lift my spirit. I know she was busy, but she made time each week to call me. ( Although it's been years since I have seen her. I don't even remember her name, but it's those feelings of love and care that remain with me." Things such as someone taking the time to visit you when you are ill while they themselves are not well as my former Pasteur had done are the things people will remember.
Let's not waste so much time trying so hard to do things to be remembered by. If you enjoy life and put others first, there will be at least one person who will remember you till their last breath. They may not remember your name, but they will remember how you made them feel. They may even tell others about your kindness which could live for decades or even centuries from the same story being passed on. Let's not focus too much on "What To Do So We Can Be Remembered," instead let's focus on "How To Be" so others will want to imitate the life you have lived.