[Ginguin]

Outside of keeping a Field Notes notebook on me at all times for jotting down ideas (or keeping score when playing a board game or cards), I have basically just copied and tweaked the entire system from http://plaintext-productivity.net/ to work for me.

For the journal, I create a new text file every month and use Markdown to type up what is happening. Every day, I insert the date and list what I hope to accomplish for the day. I will occasionally add what I have completed for the day, notes on random stuff, etc.

It's quick, searchable, and accessible from anywhere (backed up to both OneDrive and Dropbox and editable from home/work/phone, etc.).