What songs/music do you associate with certain things? For example, The first disk of R.E.M.'s Part Lies, Part Heart, Part Truth, Part Garbage will always make me think of 50's Batman comics since I would read a bunch of them while listening to that disk. Also, the Danny Elfman Batman soundtrack always makes me nostalgic for the first Lego Batman game, since it utilizes the 1989 film's score.
The Let Go album by Knock Out, the Californication album by RHCP, the Enema Of The State album by Blink-182, and Bad Religion's albums Generator and The Process Of Belief all remind me of my early childhood, as my mother listened to them quite often. Some of my earliest memories are of being in a car listening to those albums on the way to the beach.