What are you doing now? Whatever it is, quickly capture it with this simple command line app. Whenever you have to switch contexts, simply fire off a command to doing followed by a brief description of what you are "doing now" to track all the things you do throughout the day in a flat, timestamped file.
Doing is meant to be installed globally and used from the command line.
npm install --global doing-now
# To capture what you are doing now
doing the thing I am doing now
# To log out what you are doing
doing