Terminology
The words you use when writing about gore are essential to get right. Ridiculous analogies, overly-descriptive metaphors, or obscure similes will confound the reader and restrict your flow of words. Choose your language carefully and use comparisons as sparingly as possible to create a greater impact.
Realism
One of the main criticisms of written gore, particularly in transgressive or fantasy novels, is how over-the-top it all appears. As a writer, you strive to ensure your dialogue is naturalistic and fits within the world you are writing in, similarly, your characters’ actions are reasonable and logical, so why not make the gore accurate?
Pacing
A lack of accurate pacing is one of the downfalls of bad gore scenes, but this can be solved with both a little research and a sensible approach.