other than the squirming because they hate having their feet touched, nail trimming isnt that bad. I just did it to my foster as well as my sick skink. Usually if you can get their feet to rest on you in a way that you can trim without holding their legs that helps a lot. Its a lot like trimming dog nails, only easier because it is possible to use human nippers, and the nails arent as tough. If you oops and cut it too short, it will bleed a little, but some quick stop will fix that. Just be careful, and dont clip if you arent sure if you have nail vs. toe, and you'll be fine.
I normally only trim when the nails are long enough to turn the toe at all. I mean, i trim when i get a chance, but on some skinks they grow faster than others. :

These were long enough to get trimmed, and they did.
