Well, see, a headshot wouldn't work due to my blindness, but what I've been doing in the past is focussing on the person's question. I would start by opening up my chakras, grounding, shielding, connecting with my spirit guide and asking my spirit guide the question.
I've also recently begun to connect with the person's spirit guides etc. too, but before I started doing this, I would just ask my spirit guide the question and would wait for the answer. I guess my main modality was clairaudience/clairsencience.
In getting feedback from the people for whom I did the readings, I would actually come pretty close. I don't know about the whole seeing things before they happen, but in terms of getting results from questions asked regarding the person's life, it's been pretty close, so...
