Your process for decided what is important to add to your Zettelkasten
I am curious about how others decide what is important enough to add to their ZK. When I first started, I added everything and my first attempt was a cluttered mess. Now, I am a lot more selective with what permanent I add, I try and remind myself to just enjoy the process and try and follow the basic practice--capturing the gist of a concept, writing it in my own words, one idea per note, and linking the notes. But, I still feel from time to time as if I am going to end up with another mess full of useless tidbits...
So, my questions are, how do you decide what is important? And, how do you keep from cluttering your ZK?
I know the questions are really broad, but I'm curious about the thinking behind the decision process.