Guides
Working notes on the part of investing this product is about: writing down why you own something, and knowing when that reason stops holding.
Kill criteria: deciding in advance what would make you sell
A condition written down before you buy that would tell you the reason you bought is gone — and why that is a different thing from a stop-loss.
Tracking an investment thesis in Notion or a spreadsheet
What those tools do well, the one thing they cannot do, and how to tell whether the gap is worth closing.