I love lanyards.
Simply put, I feel they are one of the best ways for me to carry my gear on the river, and not just for Tenkara. It's also an amazing way for me to keep my gear ready for a grab and go mission. It stays in my car in a perpetual state of constant vigilance, often ignored, but seldom forgotten.
I like to grab the free neoprene croakie sunglass holders from swag bags, trade shows etc and use those as the neck piece for comfort. I then make a base with craft lace and braid the exterior with waxed thread. I've never had one break, although my friends do walk off with them. Maybe I should make them mankier. For clasps, I use stainless swivel snaps from eagle claw. You can/should use a more subdued clasp, but I like bling.
For those of you that make your own lanyards, what works for you?