How do I master my ability of seeing the future?

I meditate, do Qi Gong and distance healing on people. In other words meditate and practice, practice, practice!!! Practicing your third eye/psychic ability is like working out at the gym. But there is no "mastery" of anything in life. In some Asian philosophy they say that if a person calls themself a master then they are already lost. And you had nothing to do with your teacher's death, that was his doing by the life style he was leading.