I always wear compression socks- ordered a bunch on Amazon
until I found some I really liked. I wear pricey sneakers that I replace every 6 months or so.
I keep extra pens in my bag and locker.
A good pair of shears- the ortho docs were actually jealous of mine when they used them the other week.
Hemostats for an emergency or just if I can't get that pesky iv unclamped.
Tele nurse turned ICU nurse (who is apparently old school even though I'm not old)- I always have a pair of calipers for evaluating rhythm strips. A lot of nurses on my tele unit had them, but not many nurses in my ICU use them.
Snacks- I tend to have some dried fruit and some BelVita bars.
Meds- Advil, Advil cold and sinus, pepto tablets, excedrin migraine, etc. - anything I think I might need to get through a shift. I don't keep a ton of this stuff in my bag- just enough for a shift. It's not always feasible to run down to the little pharmacy in the hospital and they aren't always open.