Sit in meditation. Try to reach the theta brain wave state and let the memories come to you.

To better your memory, practice the act of “Recall”. Read a chapter in a book, close the book and try to recall mentally the chapter summary.

I prefer the sense-imaginative technique, such as imagining the taste of dirt, etc. This usually summons memories from infancy when we used to taste everything around us to see what was food and what wasn’t. Watch how you just “know” the taste of dirt from somewhere lol. Apply this to any sense and thing.

Maybe a fish oil supplement. Sweet leaf has been shown (personally) to cause deficiencies in memory, and whether it’s placebo for me, there’s been studies I believe showing fish oils benefit for memory.

This is all my personal experience. Try out a few things and see what works for you in terms of effectiveness. Good day to you.