Focus on criteria, among 6 main categories: Personality, hobbies, work affinities, life style, conjugal preference, social philosophy;You shall only indicate criteria that defines you and those you dislike the most. Then you will be able to gauge it. In addition, for each aspect, you can also gauge what you expect from your Soul Mate.
You can add a lengthy description. It's extremely important to clarify everything you indicated previously, it avoids bad encounters.