Just like that

I was thinking.....It might be good idea to maintain a journal named "What I learned today"
May be a blog..

You can know two things...
1- whether there has been any additions to your kitty of knowledge
2- may be over a period you can find out what are the sources and what you enjoy learning

Anyway I am sure this makes sense because we are exposed to so much on some days...we just dont get the time to absorb the right lessons. This could help..