Rainsford uses three techniques in his struggle against Zaroff, what are they?

Raisford sets up a few traps to hinder his capture. There is the "Maylay man catcher", "the Burmese tiger pit", and some other tree spring thing.

Rainsford tries to scatter his tracks, hides in a tree, and he also jumps into the ocean. The dogs lose his scent in the water.

He tries to create a false trail. He crawls up in a tree and could, in fact, attack Zaroff by dropping down on him. Ultimately he "doubles back" and gets into Zaroff's bedroom and hides himself when Zaroff thinks he must be dead after jumping off the cliff.