https://docs.google.com/spreadsheets/d/1tBrZEMFK9XNWxiqOxE8o...
The GoogleFinance Function has been a great way to help me "visualize progress" in a very different way compared to default visualizations provided by stock brokers
I have also tried to keep track of analytics more manually but hope to find some time to automate later (if you wanna help, lmk :)).
Basic metrics like the following: Hit Rate: % of investments that had a profit / Loss Rate: % of investments that had a loss / Size of Avg Winner / Size of Avg Loser / Expected Value of Investments / Win to Loss Ratio / Avg Holding Period / Opportunity cost analysis (eg: what is the stock price say 12-24 months after I sell?)
These basic things would help the individual investor get a lot more insight than they can easily get today.