Accurate psychic abilities are a matter of sufficient understanding and communication.
An accurate psychic has to keep in mind two main possible sources of error: errors caused by the inaccuracies of perception and comprehension of the psychic, and errors caused by communicating this understanding to others.
To be an accurate psychic, the psychic must first minimize the unclarities within oneself. Maintaining a soft grasp on psychic knowledge, developing emotional and intellectual clarity, and continuously striving to improve will lead to more accurate psychic abilities.
Since often the results have to be communicated to other people, further problems may arise. The limits of comprehension of other people as well as the psychic's psychological, social understanding and communication skills influence just how accurate psychic results can be.
To be an accurate psychic, work on developing inner clarity and be aware of the limits of perception and communication.