The rhizome of Anubias is different than Java Fern or Bolbitis in that it is very fleshy and bruises easily when divided so a sharp knife makes the job easier. Please be careful when using sharp implements

Scissiors tend to pinch and bruise. Where it is bruised will get mushy and die, sometimes the whole plant will die.
This piece of Anubias Coffefolia had some algae on it so I soaked it in Peroxide(like you use for cuts) first and rinsed. If you don't rinse good and peroxide gets in your tank it is perfectly ok. The peroxide will combine with the water and make... water

1) Anubias with algae
2)Soaking in peroxide
3) After soaking in peroxide
4)Cutting Anubias with sharp knife
Anubias can be attached to wood, rocks in the same manner as Java Fern and Bolbitis. An other way is to lay the rhizome on the substrate and lay a rock or something heavy enough to hold it down. In gravel anubias roots will attach to the rocks as you can see in the pic of the anubias being cut this one has rocks in its roots

These are all low light plants.