An interesting story is about a letter that was mailed from France to the United States. For some reason the letter kept getting directed to different points around the world. It did finally arrive at its proper destination after some time. The letter was taken to a young Indian women who had the gift of psychometry. She accurately described the places the letter had been along with the people and situations that where involved around the journey of the letter.
Telepathy psychometry can use any kind of object, it is best if the object has come in close and often contact with a certain person. Jewelry, clothes, hair and any kind of personal effect make good telepathy psychometry objects. Minerals and metals are considered less reliable and harder to get a reading from. Most people who practice psychometry develop different skills. Some people can see the complete history of an object and the person who it is associated with it. Other people who practice psychometry can only see what is going to happen in the future. In the practice of telepathy psychometry it is best to practice and try different areas of psychometry. This is because very few people can see the future, past, see the complete contents of a letter and so on.
Typically those who practice telepathy psychometry develop their skill in a certain area. Once you find your area of psychometry it is best to develop that. A word of warning, if you are using an object that has had several owners or been handled by many people you could receive confusing and conflicting impressions.
Overall there are no definitive guideline for learning telepathy psychometry. A person can follow the guidelines for developing the other psychic abilities and this will help with psychometry. It is best to just practice and practice psychometry in a way that gives you immediate feedback.