It is nice to be thanked. It is even nicer to be thanked. Especially when it is deserved, and even more so when it is unexpected.
Therefore, it would be nice of you to make it a point to thank those in your vicinity. To thank those who do the emotional lifting. Those who picks up the slack when you don't. Whose default mode is to do everything everyone else don't. Who, in ordinary and crisis situations alike, are the ones to keep tempers and group cohesion both from crashing into the dust-free floor.
It takes a lot of effort and energy to keep a situation where nothing happens going. And most of it happens in the dark, unthanked underbelly of the everyday bore- and choredom.
So. Do make it a point to seek out those who effort, and thank them.
It's the little things.