I believe that everyone knows what they need to improve on, and now is an excellent time to take a din v’chesbon of one’s own middos and make a conscious effort to make improvements. It is an excellent idea to do something l’iluy nishmos a young innocent neshoma such as Leiby a”h and l’zhecher nishmas a gadol such as R’ Abuchazerah z”tl, who were both taken in such a tragic manner.
It is great to offer ideas and clue people in to how things can be done. But at the end of the day, everyone really, really knows what they personally need improvement in, and that is the first place they should be looking and working on instead of adding something else, IMHO. That would be a greater mitzvah. Both are really great ways to honor these two neshomos.