On any given day, there are dozens of people who's jobs facilitate my own. Many of these people, in accounting, payroll, maintenance, shipping, etc., are people I rarely if ever interact with. Others I engage with more frequently (departmental or college staff) or occasionally but intensely (grants office staff). When I'm pushing against deadlines or have a todo list a mile long, it's easy to forget about the contribution many of these people make.
That's why I try to go out of my way when things slow down to thank the people that have helped me. I've written a little about this previously, but I can't stress how important it is appreciate the efforts of staff members that facilitate what you do. Whether you are a grad student, tech, postdoc, PI, or work somewhere completely different with none of these distinctions, there is a good chance your work is largely dependent on someone else doing a good job at their's.
Both historically and more recently I have been witness to some pretty egregious behavior when it comes to PIs and their treatment of administrative staff who's only offense was to be helpful. That kind of thing not only makes you look like a douchcanoe, but is completely counterproductive for everything you need done by admin staff in the future. You may feel like hot shit because you just brought in a new grant or published a big paper, but I can assure you those moving the paperwork don't care about your h-index*.
I'm often surprised that this even needs to be pointed out, but with ample evidence to the contrary, I'll keep doing so.
*Actually, no one does.