It is simple, searchable and extremely flexible.

I have a list for each date in a Logbook list and keep dumping all my completed TODOs at work there. It has come in useful a few times already to recall when did I do thing X.

I also have an Inbox list to keep all my thoughts in there, which get groomed once a couple of weeks. The mobile app is a little slower than I'd like but it is the best tools I've found to organize my thoughts.

I also get daily emails from Workflowy which provides a nice timeline of everything I've done or recorded at any point.