Something that was very very easy to make quick notes on would be helpful.
I make notes in a text file and it syncs via dropbox to all of my computers.
It works pretty good.
I use an old program called ESP to pull up the .txt file when I need it.
It literally takes 2 seconds to open the .txt file
I type: xen (for xenforo.installation.and.changes.txt)
and it is the first file
and the file is open.