Mediumship is like necromancy in a way (communicating with the dead) but it's being a vessel for the living dead. Filling oneself with the essence of the dead in order to communicate with the living.
Automatic writing is writing, or typing, or whatever that just flows so natural and seemingly comes out of no where. You just become inspired in a way by something or somewhere and have a whole new perspective. Kind of like enlightenment. When you are enlighened, the automatic writing comes into place by allowing you to record the information.
I really like automatic writing old fashion pen and paper style. I can easily see when my handwriting changes and that signals a change in source or tone. The source is where you are pulling the information from.
A combined type of mediumship and automatic writing would be filling yourself with the essence of the dead and recording it instead of becoming a messenger of sorts.
Being able to communicate with someone or something or somewhere without actually talking to them. "Mind to mind communication," of a sort.
Twins innately have this ability.
This may partly fall under Clairvoyance. The ability to see the energetic field that surrounds each one of us. Inanimate objects even have an aura. It's just energy surrounding anything. But its especially important for us humans. If you can see auras then you can identify sources of energetic leaks, or see where something is infiltrating (an energetic disturbance).
Being able to foretell or foresee future events.
These gifts are centered around our senses. Clairvoyance, Clairsentience, Claircognizance, Clairaudience and Clairgustance.
Clair literally means, or translates to "Clear."
This is what you think of most often. This is the main stream what everyone is pushing. It means clear sight, being able to clearly see something despite any other interfering energies.
This translates to Clear Feeling. The psychic ability for a person to acquire knowledge by means of feeling.
Being able to clearly feel all that is. Empathy is being able to feel for another by "putting yourself" in "their shoes," and is a trait acquired through compassion. It’s like empathy but much broader.
Ability to Sense the Collective Shifting
Being able to sense, or feel, the collective shifting to a new conscious. If I had to put a symbology or picture to this I would say it's migrating, in a sense. Think of a flock of Canadian geese or other birds.
Having gifts like those listed are great but hardware tools such as crystal scrying balls can make one stronger than another.
Other things like crystals and books can certainly come in handy too. Books can keep the collective all connected to "all that is." You can open a book to a random page that stands out to you and literally get the whole picture, kind of like tarot cards.
Crystals can be charged with a certain energy or "programmed" in a way to act a certain way to enhance any of these psychic gifts.