On my old GPS, and on Google Maps, I can add a saved point on my map, with notes about it.
Let us do the same with our in-game map. Let me tag all of the good spots for sparkly, or the locations of all paper trees, or the spot where someone had a GlitchWedding.
It's pretty simple, just let there be little dots that have a note attached shown on our map.
It would also be neat to be able to share such a point with another Glitch, but I'm not going to whine if we can't do that.
Related: Let us set these points as our destination, and even add them to a route as places we want to stop on the way.