One thing that I have decided to do to remember each space that we live in as a family is create a small photo book. You can see the one I created for our first time in San Diego here.
These books are the easiest. I just go through all my photos from the time that we lived in the current place, upload them to Blurb.com and stick them in a somewhat chronological order and print a 7x7 inch book. Other than the title page, I don't add any words so the books are really a photo journal of different things that made our house a home.
Below is a sampling of the photos I included for our 15 months in Oxnard, California.
Super simple, but such a fun way to remember each place.