I approached this problem and decided to try and solve it for myself just over a year ago. Firstly, I decided that instead of knowledge being segregated by medium (notes -> evernote, bookmarks -> Chrome, etc), it should be organised by purpose.
The most important purpose, I decided, was personal goals. Knowledge/information which is relevant to helping me achieve my own goals is the most important thing I should be focusing on, and should be extremely well organised and easily accessible. Any other interesting info that falls outside that is a bit of a shame to lose, but ultimately just a distraction and clutter. For this purpose, I developed this tool: https://nachapp.com
I believe the next level of information down would be general learning/knowledge. Stuff that doesn't fall under any specific goals, but is still useful information to know and understand (and may in disparate ways tie into core goals). For this, I'm currently using https://pinboard.in, although it's not ideal as it's again limited to a single medium. I have a solution in mind, but haven't started developing yet. If you're interested, feel free to get in touch and I can keep you updated (contact info in profile).
The most important purpose, I decided, was personal goals. Knowledge/information which is relevant to helping me achieve my own goals is the most important thing I should be focusing on, and should be extremely well organised and easily accessible. Any other interesting info that falls outside that is a bit of a shame to lose, but ultimately just a distraction and clutter. For this purpose, I developed this tool: https://nachapp.com
I believe the next level of information down would be general learning/knowledge. Stuff that doesn't fall under any specific goals, but is still useful information to know and understand (and may in disparate ways tie into core goals). For this, I'm currently using https://pinboard.in, although it's not ideal as it's again limited to a single medium. I have a solution in mind, but haven't started developing yet. If you're interested, feel free to get in touch and I can keep you updated (contact info in profile).