A monitor, a TV, an Xbox360, an Xbox One, a Wii, a PS2, a non-working SNES[1], all the power bricks for those, a Dell laser printer, a keyboard, a Dreamcast keyboard, a fan, a silver-plated brass tin, an obsidian arrow head, a telescope, some cables, a Korg kaoscillator 2, a Yamaha QY8, a pack of water balloons, some books about patient safety, some books about QI and health, some cards about creative problem solving, a bottle of spray sunscreen, a bowl, a cup that needs to be washed, some pencils, some pens, some notebooks.
Home desk has some speakers, a monitor/mouse/keyboard, and a random assortment of daily-life stuff:
* Hand-cream.
* A pair of watches.
* Coffee mugs (3!)
* Pens / paper.
* Picture our my son.
* Some esp8266 development boards.
* My phone & a kindle.
In the draws beneath my desk I have random electrical components, sorted into neat boxes, paperwork, passport, CF Flash cards, card-reader, SDR reciever, and similar USB-based accessories I need nearby but not constantly plugged in.
The standard part: laptop, mouse, second screen, a led lamp (capable of switching from intense blue light to warm beige light) and a printer
I keep also a very big ring notebook, a lot of pens (I hate to get up in the middle of a thought to look for one) and a set of 32 colors markers for when I need to make some schema or uml diagrams on paper.
I aim for a minimalistic work environment... So 3x monitors, wireless keyboard and mouse, speakers and my desk phone. My PC is down on the floor underneath, and I've gone 'slightly overboard' on the cable management to keep it as neat and tidy as possible.
A mug but it does not hold water. Instead, it is filled with cheap, swag pens from trade shows. I never cease to collect them and fill my mug. I constantly lose pens and expensive, ornamental pens would be a pure waste of my hard-earned cash.
Laptop, monitor, keyboard, mouse. Mac mini serving as a small server for test operations. A stack of NYT crossword puzzles. My lunchbox and some snacks. A light saber, a flashy light foam stick thing, and a 30-minute hourglass.
It's a bit chaotic.