LPT: When you take pictures of an important event or time, make sure to write down the date and event on the back of the picture, you and your loved ones will thank you in the future.

Recently my grandma died. As we were going through the house collecting pictures of her, we found lots of pictures of her when she was young, her at her wedding, her with my deceased grandpa, etc. We also found lots of pictures of her with others with no clue or indication of what those were pictures of. Do yourself and those you love a favor and write the event names on the picture in case you might need them at any time.

Edit: I'm not necessarily talking about photos YOU take. When a loved one dies they will usually always have various photos on the wall, etc, that will bring back memories of their life.