When I began working for myself in my early 30s I lost track of time. Previously I worked for other people - companies and remembered events of my life based on associative memories connected to the job. I found that when working for myself those associations to the rest of my life were gone.
I came up with a milestone list. At first it was typed out and now its a spreadsheet and digging into the past all the way to my earliest memories in childhood. Its personal history and it has patterns in it.
Yesterday I saw a new pattern in my history.