Meetings and information I will need to reference: One Note backed up to a network drive. It's got a nice integration with Outlook meetings, lets me start a note with info about time, date, subject of meeting, location of meeting and participants present. I also keep a password-protected file with non critical passwords here, but don't tell anyone.
Day-to-day sketches and TODO's and little note lists: I keep a spiral note book next to my keyboard. I'm a leftie so it's upside down. I use the blue Pilot Drawing pens in various thicknesses. They dry instantly, so no ink smudges. Nice.
In addition to these I keep a day-to-day diary in .txt documents on my computer, I just open them in Sublime text or vim and make a new one every month. I try to just write four or five lines about what I've done every day as well as what I need to do tomorrow.