Ah shit man, you eventually kinda get used to it. Life's really about enjoying and experiencing the moment you're in as best you can, as often as you can, as long as you're able. If you can manage that, you'll at least know you have savored those smudges in the rear-view. A piece of advice is to make sure you have devices to record and hold on to as much as you can, back things up always! Don't be afraid/surprised if going back and seeing something you though you had lost completely in those records makes you feel strongly emotional.