Every time you look up something on StackOverflow, refer to the API docs, or refer back to the ticket, use case, or requirements document, make a note of your question and the answer. Even when you stop typing to take a break for a moment, or after pushing code while you wait for the ci/cd pipeline, note down where you are and your last action or change.

Every time you start to write a TODO comment, make a note instead, or also.

Consider Kent’s Beck’s recommendation to write down every decision you make.