Steam has an inbuilt Screen Capture, you can use it for any steam game by pressing F12. This will show up in your profile. When you want to link those images somewhere, open the full size image in Steam, right click and get the url. And thats it. No need to upload the images anywhere else.
Or you can use the Skyrim Screen Capture method which works by using Prtscn in-game. These will be saved in the Skyrim folder and will have to be uploaded before being posted elsewhere. I take screenies using both and link using steam.
As for console commands, I use the free camera one as well. And from now on I will use "TM" as well which will disable the menus, basically the HUD. Disable the crosshair in the options. I also want to try "Tai" which supposedly freezes npcs, making for some great mid action screenies.