I keep coming back to a text file in my home folder, and a shell command that opens that file in a text editor and scrolls the cursor to the line for a new entr

I keep coming back to a text file in my home folder, and a shell command that opens that file in a text editor and scrolls the cursor to the line for a new entry. Also +1 for paper and pen if that's viable. It's a lot easier to do diagrams, symbols, formulas, simple maps, and other visual media that way.