What should we do to get a human birth again in our next life?

There are 8.4 million species of life in existence. In the species below human beings-animals, birds, fishes, insects, birds, etc-there is no free will. Hence, upon death the soul is naturally and sequentially promoted to the next species. But human beings possess the free will to act according to their volition, and hence, they are responsible for their actions. Their next birth is decided by their karmas in the present life. The facility to do karmas is given to the human species, not for animal-like activities, but for God-realization. The scriptures state:                            आहार निद्रा भय मैथुनंम च सामान्यमेतत् पशुभिर्नराणाम .  "Eating, sleeping, defending and mating are activities that animals can do as well as humans." The human form is special because in it we can attain God. If however, some human being focuses his or her consciousness merely on eating, then the body of a pig becomes more suitable for such a person, and the soul is allotted that body in its next life. If someone makes sleeping the goal of life, God says that the body of a polar bear is more suitable for such a consciousness and allots it in the next life. In this manner, one of the factors determining our next birth is our consciousness at the time of death. Another factor determining our next life is the Law of Karma…….. The Garud Purana states :                                         ऊर्ध्वागतिस्तु  धर्मेण अधर्मेण ह्यधोगतिः   “The one who performs pious deeds goes to the higher abodes in the next life; one who does sinful activities is demoted to the hellish abodes.””As you sow, that shall you also reap” is what the BIBLE also says. However, the Law of karma and the determination of consciousness are so complex that we cannot analyze and determine our next birth by ourselves. The all-knowing God alone has the ability to determine and allot it to us…….