journaling

How do you know where you're going if you don't know where you've been?
My trading buddy doesn't keep records about his stock transactions. Not
what he traded or when or why. To me, this is a mistake, and I've heard
a couple of differnt people on podcasts saying as much lately.

One speaker said they keep track of their account balance every day.
This forces them to confront their losses and stay focused on not losing
money. I do this on weekends, so that I have a record of my account
balances.

Another speaker I heard (Toni Turner, I believe) said she keeps a
journal by keeping charts of the stocks she trades with entries & exits
marked on them. I have done something similar to this. Earlier this
summer, I went back and printed charts for all my trades and marked them
up. I need to go back and do it for trades I put on in June & July.

I currently keep a spreadsheet of all my trades. I try to put on there
why I got in and why I got out, but there are so many columns on there
that my text is cut off and it's not easy to read the full reason. I
think I may switch to keeping a notebook of chart printouts. Then I can
have more room to write on there what my reasoning is for exits/entries,
as well as draw my potential stops and profit targets. This might be
some duplicate effort, as I will still keep the spreadsheet for
statistical and tax purposes.