Normally I’d say a purple Pilot disposable fountain pen, but today I’ve got warm and fuzzies for the satisfyingly weighty Post-it popup sticky note dispenser. I’m talking about the one with the clear top that weighs roughly sixteen pounds (13.8 ounces according to Amazon).
Like the tin says - what’s your favorite? No copping out with categories, either. One item to rule them all!
Got to be the magnetic tape write-ring. But only from a technology-oriented office of the 1970s. Most normal office workers won’t know what it is. But what fun!
Mini-clamps/bag closers/paper holders better known as Binder Clips.
I, too, came to praise binder clips in all their varied sizes. I steal a few (hey, my business) every so often because they’re so handy at home. All the frozen veggie bags in our freezer are kept sealed by binder clips.
Post it notes. I use them at work and always get really bright colors - or flamingos - because I don’t want to hear complaining from accounting about how accounting didn’t see this report or that one.
The rubbery-textured nice-flowing fine-lined PaperMate FlexGrip Ultra pens.
Uni-Ball 207 gel pen, 0.7mm (medium). I usually prefer 0.5mm as I write small but I find those either don’t flow as nicely or yet tear the paper. Best “commodity” pen I’ve ever used. Have a half dozen within reach at all times, have one clipped one to my shirt, a bunch in the glove box… they’re great.
Accidentally bought the 1mm “bold” variety once. They’re also very nice and force me to write larger.
I love office supplies!
At the moment I am LOVING the Pentel EnerGel .07 (BL437R1) pen. I bought a box not in regular blue, but navy blue. 
The local office supply store’s rep dropped off 2 (one black, one reg blue) a couple of weeks ago. I immediately purchased a box. They are the best pens for crossword puzzles.
The unbent paperclip. As an IT guy, it is indispensable.
8½"x11" cardstock, because I use them to make self-mailer birthday and Christmas cards.
Ditto. We use binder clips at home for all sorts of snacks and other bags. MUCH stronger than the wimpy springs on other kinds of chip bag thingies.
My P-touch PT-1230PC label printers. The bonus was finding a large box of the label tape at an estate sale for $10. There was 54 tape cartridges, I have what should be a lifetime supply of them now.
Problem is, once I pick up an unbent paperclip, it becomes bent real quick.
Pilot G-2, the best (cheap) pen ever.
Sick. 3480 cartridges improved my life a lot. Finally tossed the last cartridge i saved when the amount of paper around my home office decreased to where i seldom need paper weights. I will admit the cartridges didn’t do as well for ring toss games.
3x5 Yellow Post-it. I’m addicted and have no desire to stop.
Oh, get one of the refillable metal ones. The Alloy or the Style. It’s a transcendent experience.
I love composition notebooks. Including Junior Composition Notebooks. Right now, when they are like, fifty cents, I way, way overbuy.
Pilot Frixion gel pen, blue ink, 0.5 fine or 0.38 extra fine. They are erasable. I don’t think regular stationery stores carry them, we have a Japanese stationery store that has them, or I can order online.
I wish the clips were sturdier, because the eraser lasts a very long time, so I only need to buy refills. Until the clip breaks.
I don’t know what it’s called. It’s like dry liquid paper in tape form. It comes in a cute little cartridge shaped vaguely like a gun, and you roll it along text that you want to white out. It lays down a strip of film-thin dry liquid paper, exactly one line high. It’s enormously satisfying to roll it along on the paper and wipe out a whole line of text with one sweep - and it’s perfectly dry.
I have a mixed marriage, in that my wife agrees with you, but I have a different opinion.
The Uni Jetstream is by far the best pen ever made, cheap or expensive.
Agreed. But a couple of years ago I switched from binder clips (for home use) to plain old-fashioned wooden clothespins, because of the rust/marking issue.
I admire and envy your confidence. I do the New York Times crossword puzzle almost every day, but only in pencil. Because, yes, I make mistakes sometimes.
And the best pencil available is the Pentel Twist-Erase, which comes in variety of lead widths. I use the .9mm for puzzles, the .7 for everything else. As far as I’m concerned, wooden pencils are obsolete.