I wanted to do a project using these ws2812b leds, and I find them nearly impossible to hand-solder them because of the tiny contact points. Can someone teach me how to solder these by hand? They are surface mount components as you can see in the images.
I assume you don't have an SMT rework station :)
Put some solder paste on each pad. Place the part on the board. Use a toothpick or something similar to hold it in place, and use your iron to melt the soldering paste on each pad individually. I would guess about two cubic millimeters. If you are not happy with the result, you can touch up each pad individually. Use plenty of flux for the touch-up.
Practice on a scratch board with a dead part first, as it's easy to mess it up if you haven't done it before (but then again, how would I know :) )