Soham is one of the most effective ways for self realization, it is also very easy to practice, it comes under swara yoga.
Swara yoga is an ancient science of understanding of breathing and by the help of Soham you can understand it in a better way. Soham is a natural rythem happening in our breathing, as we inhale the swara is SO and as we exhale it's swara is HAM , so SOHAM is one cycle of breathing which is happening all the time.
Soham means "I AM THAT" ( SO- that, HAM - me) so here I am that denotes that supreme consciousness which is also within us and you can connect to that consciousness by the help of understanding of your own breathing as told in swara yoga. When you practice Soham meditation you connect to your mind , then mind to consciousness and consciousness to supreme consciousness.
Practice of Soham-: Soham is very easy to practice just you have to follow few steps:
1) Adopt any comfortable meditative pose keeping your spine erect and chin parallel to the ground.
2) Now slowly close your eyes and focus on your natural breathing pattern for some time.
3) Now mentally chant so with inhalation and ham with exhalation with each and every breath . As you inhale concentrate on your inhalation and at the same time mentally chant so and as you exhale concentrate on exhalation and mentally chant ham at the same time.
This is the process of practicing Soham ,after practicing it for 15 to 20 minutes , now be still and don't focus on your breath just be still and relax and feel the calmness and peace and try to be like this as much as possible.