Yes. I use the shit out of Claymores, as its really a free kill, sometimes multikill
Pay attention to the narrow corridors you are in. Stop watching directly ahead and look towards the ground.
Example:
Flood zone. B Flag
There is a starway that leads up to it. Folks love to put Claymores on the landing 1 floor below. So watch for it.
Also, you can clearly see the tripwires once they are deployed, they are angled up to go directly across your vision.
When moving into a corridor, lead off with a grenade, use the mini's, so you have more. Claymores are actually pretty fragile, compared to other explosives, and will typically detonate if something happens near them instead of on top of them.
Start making mental notes where you see others lob grenades as well, most times lately its because they are clearing claymores and not going for kills. (Weird, but just something I have noticed)
Lastly, start using them yourself, no better lesson than experience.
TL;DR Look around at the floor more,