The largest category of your initial
memory list should be top-level activities.
These are common actions, oft-repeated and not tied to a specific date or event.
They range from your most important activities like your life's works, all the way down to obscure habits and minor trends.
In no particular order it would include your stores and shops, chores through the years, family visits, parks, daydreams, all business associates and employees, yardwork, libraries, celebrities seen, local politics and personal affiliations, churches, bands, bars, failed hobbies, gatherings, favors done, neighbors, amusements parks and day trips, local walks, random wanderings, and much, much more.
The top-level list may be surprisingly short. So my life has been really boring.
Only when a few thousand items have been assembled, can they be reliably sorted into lower categories.
The precise categories may be more important than the memories themselves, because they will define the nature of your awareness.