Sorry for your loss.
Now you have been given an outstanding example to live up to. If you want to really honor that MAN, then you have your work cut out for yourself. You need to honor him by living the same kind of life he did. You need to start doing the same things he did and mentor someone just like he did. Remembering him is easy, living like him is tougher but says more for his efforts with you. That would be the best kind of memorial, pass it forward just like he did.