What is the question?
The most important part of any Tarot reading (in my opinion) is the question.
What is it you that you, or your client want to know?
I read for a young client the other day who had a list of questions about job, boyfriend. Clear questions that would help her shape the next year of her life. She had recently been to a different Tarot reader who had focused on her life in the future, marriage and middle age. Whilst much of what this tarot reader said may well have been astute and inspired- it didn't actually help, or answer my clients questions.
Sometimes it is the client that causes the problem. "When will Simon fall in love with me?" Is a closed frame question I have to unpick before I can read because an hour can not be be filled by saying "He won't".
So lets focus on getting the question right, whether for yourself or a client.
My first point of consideration is am I prepared to read for the general question? Everyone's ethics will be slightly different. I am sharing my current ethics for interest, not to suggest they suit everyone.
Third party questions (questions about some one other than the client) I am happy to read for these as long as they are focused on my clients relationship with the other person. After all, any Tarot reading is likely to be about relationships (love, family, friends, work) some where along the line.
Health. I always stipulate that anyone worried about health should see their health care practitioner. I will read for how to best improve/support health, but only from a holistic point of view. Never to predict, diagnose, or interfere with the current health care.
The impact of hearing the answer. I always consider whether the answer could cause harm to a client. Someone in a vulnerable state could ask me a question about health, money, or loved ones & if the answer is very negative my reading could cause them harm. I have no "rules" for this, just an awareness that I believe I am responsible for how my reading affects my client. I know not all readers work this way, some believing the tarot gives the right message no matter how traumatic. This is my choice, and it works for me.
Phrasing the question