Keeping notes is more valuable as we get older.
Maintaining event calendars probably comes first for most people.
I use Google calendar for time and date related events so that I can get reminders by email.
For to do activities I now use the Microsoft to do app which is an upgrade of Wunderlist.
For procedures of various types I post to my website here for my own benefit as well as for others.
I download manuals and instructions and send them to Kindle and Google play books.
Things I need to recall go to Evernote.
Items I need to read go to Pocket for temporary storage.
Google chrome Doc's enables OCR of printed docs into my digital files by importing images from an iPhone scanner application
