I think there are two kinds of knowledge: personal knowledge and team knowledge.
Personal Knowledge Management
Should I write down and organize stuff that I thought was useful in the future? To be honest, I’m not quite sure. Most of the time, I find myself saving or writing down things but never ever look at it again.
However, there is one form of Knowledge Management which I think is both easy to implement and useful: bookmark a web page for later consumption or future reference. For me, I simply save any article that, either I don’t have time to read at the moment or I think I might need it in the future, to Pocket. Then I can easily search and review articles when time comes.
Team Knowledge Management
No one would deny that a well-documented knowledge base could make the teamwork much more efficient.
In a team-setting, it is always a good idea to document everything that helps coworkers and myself to setup, develop and maintain the project.