One of the worst work feelings is having to summarize your accomplishments from the last year while you are already buried in other problems. Maybe it is for a yearly review. Maybe you are applying for a new job. Either way, you suddenly need a clear record of what you accomplished, and you realize you have to reconstruct it from memory, old emails, Slack messages, and scattered notes.
I recommend writing a couple of sentences each week about what you accomplished that week.
That small habit makes a huge difference. When it comes time to update your resume, prepare for a review, or apply for something new, you already have the raw material. Instead of spending days trying to remember everything, you can usually pull it together in about an hour.
Set a recurring reminder on your calendar. Mine is Thursday morning.
The key is that a week is short enough that you still remember the details clearly. You do not have to write much. Just enough to capture what changed, what you improved, what problems you solved, or what impact you had.