I actually do ask myself in many personal 'live' interactions if I should thank someone or show appreciation for something. It's really hard. I did not grow up with that. It never really occurs to me to thank people, unless it's something like a stranger opening the door for me, or a friend taking care of a bar bill. Those seem obvious.
Then there are the times Dan will do the dishes and he will clean up a couple of mine that are sitting there. Or he will tilt the tv over for me when i am on the edge of the room working out while both watching something. Little things. I really am making an all out effort to notice and appreciate things. I know i am self absorbed, but i can still TRY better.