A daily journal with sample entries, running from the pre-market plan through the post-close review.
The daily journal organizes trading one day at a time. Write the plan and the watchlist before the open, log calls as they happen during the session, and after the close go back over whether you did what you said.
That day's fills and P&L attach themselves. Because the plan sits next to what actually traded, the review does not run on memory. A finished journal can be dropped into a performance report as a daily journal page.