By time-line I meant any content that is put be it promises or decisions or even imp events like meeting someone new must be stored with a timestamp and can be viewed in a chronological order. Something like facebook timeline, I can jump right back to Jun 2015 with a couple of click and see what was I thinking that time. Something we used to do in a Diary which had a page for a day. This may also help reminding us important recurring event like Birthday's anniversary, insurance premium without having to explicitly look for them