Diary: To Keep or Not to Keep
Writing at The Atlantic, Kasia Cieplak-Mayr von Baldegg discusses Teresa Amabile's tips on keeping a diary. They're quite good.
I kept a diary for several years, partly with the egotistical thought that one day someone in my family might find it of interest. I scribbled away my observations through days good and bad, some exciting and many too boring truly for words.
Then I stopped.
Time was one factor. Another was a recurring lack of progress in certain areas. Self-censorship was serious barrier plus I found that the overall feeling evoked by the process was not positive. It was too easy to slip into a form of introspection that was less of a boost than a trap.
I'll probably shred the damned things.
An admirable alternative to daily journals is to do what a sage employer of mine practiced: Write an annual account of what you've learned about life.
Now that could be of real benefit to your descendants.