> There's no procrastination about organizing or perfect tags. Just brain dump the thought or notes and move on with life.

I keep my notes on paper and write them in real time, so I agree with this very strongly. I manage to keep up with the real world despite this.

My paper indexing system is two simple things.

1) Write in the next available space. When done writing I draw a dividing horizontal line straight across the whole page. Just above this line I assign it a serial number in a little box.

2) Starting from the back of the last page, I keep metadata for each entry. Usually topic tags, but sometimes it's more involved. I usually do this when I am under less time pressure. It doesn't even have to be the same day. I'm not strict about completeness because if I don't care... well I don't care.