I think there’s lots of ways, but what exactly will work for you and your team requires some experimentation.
- Journalling for yourself is a good idea, and related to this are brag documents: Get your work recognized: write a brag document
- You can encourage progress and/or project updates to be written and shared once a week.
- The same can be true for daily stand-ups—written and asynchronous in a way that leaves behind information for the rest of the team.
As you say, it’s easy to forget, but you can automate. If you use Slack, there are plenty of plug-ins out there that automate the collection of this data via DM, such as Geekbot: https://geekbot.com/
That way you can set what you want and forget about it, and it’ll prompt you and your team at the specified times each day/week, and DM everyone to collect the information.