There are necessary duties, which you have to perform due to a human birth. Apart from spending time for the above one should spent the rest of his time in meditation towards God Consciousness. In that way, you can realize God immediately. King Khatwanga, as mentioned in the Bhaagavata, is a clear example. In the Gita too, Lord Krishna has categorized his devotee into four. They are:
Aarta: The distressed devotee, who is suffering very much to be relieved from pain and sorrow.
Jingyasu: Inquisitive seeker towards higher knowledge.
Artharthi: Desirous for earthy possession like money and land.
Janni: One possessing of higher spiritual knowledge. Among these, the one who possesses spiritual knowledge (Janni) is the best. He knows that the world and its objects are perishable. Unless you fulfill the earnings (Prarabdha) of your past life, you cannot be free from the cycle of birth and death. Though you realize God, you have to clear your balance, or clear the earnings of past life or Prarabdha.