As I get older, writing stuff down pays bigger and bigger dividends. I have a series of "notes" files on various subjects, which I keep on Dropbox. When I learn

As I get older, writing stuff down pays bigger and bigger dividends. I have a series of "notes" files on various subjects, which I keep on Dropbox. When I learn something (especially something undocumented), I put it in the right file so I can find it later. I've become much more productive (and less frustrated) as a result.