Presence means letting a moment finish before mentally replacing it.

The mind moves to the next thing before the current thing has ended, so experiences get overwritten while they are still happening. A moment needs a small amount of empty time after it to actually land. Filling that gap immediately is how full days end up feeling like nothing.

Try leaving a few seconds between activities. After a conversation, before the phone. After a meal, before the next task. It is a very small change and it noticeably increases how much of your day you remember.