Read every psychic book you can get your hands on. This will not necessarily teach you how to develop your psychic gifts but will open your mind to the possibility of powers you as yet have not even been aware of as possible. When your mind can conceive a possibility it is much more open to developing these psychic powers.
Hands on healing is another area you should look closely at. I have never met a successful psychic medium who does not have the ability to tune in to pain and heal. Healing is an essential part of improving your psychic ability. Healing develops in stages, first you sense the pain through your hands, you may feel excessive heat, cold or a vibration around the area that is in pain.
As you develop this sensitivity you will start to sense it from across the room, not so much as a sensation but more like a strong belief that you know that that person has pain in specific areas and you will progress to the point you know why they have that pain.
Through time you will be able to do it remotely over the telephone and be able to assist reducing their pain. How does this actually work? The honest answer is I am not really sure; it could be a form of energy exchange, hypnosis or an activation of belief in the listener, however the why is less important that the result.
Another essential skill you must practice is meditation. Meditation is quite simply a way of stilling your mind and slowing down your brainwaves. Focus on breathing in for 5 seconds and holding it for 5 seconds then back out for 5 seconds, this will slow your heart rate and still your mind. Initially your mind will wander however just refocus on the sound of your breath and the beat of your heart, with practice it will come.
Psychic mediumship is an altered state of consciousness, so meditation and healing will help you open that door activating and enhancing your psychic development.
Lastly seek out mentors; some mentors will be for your psychic development training other may be to allow you to delegate the tasks that you feel are not your strengths. It may be marketing, accounting or managing your business, however the secret is to build a team around you so you can focus on doing what you do best.