I bought a piece of 1.5 inch stiff foam to try to fix a sag in a bed. It didn’t work but having that thick piece of solid foam around has been a life saver.
Need something flat to put a laptop on? Throw it on the foam. Going to be doing something that requires you to be on your knees for a while? Get the foam!
It went from stupid purchase to something I’d gladly replace if it broke.
Check if your monitor is VESA compatible and buy a monitor with that brack if it is. Don’t cheap out, you’ll want to spend at least $100 for quality arms IMO.
Also, make sure your table is strong enough that it won’t warp - you’re going to be putting a lot of weight in a small area. It ended up warping my IKEA desk but I didn’t mind since I got it second-hand. You can put a block of wood between the clamp and the table to distribute the stress and keep the clamp from leaving a mark as well.