Blue stones or Neelakkallukal 4

In Bhagavad Gita, Bhagavaan tells Arjuna to remember Him always and then fight " thasmaath sarveshu kaaleshu maam anusmara". So remembering Him all through life and as a result being able to remember Him at the time death enables one to attain moksham. It is interesting to note that in Bhagavatham Bhagavaan says : 

kaamam krodham bhayam sneham
aikyam sauhrdam eva ca
nityam harau vidadhato
yaanti tan-mayataam hi te

People who constantly direct their desire, anger, fear, love, feeling of oneness or friendship toward Bhagavaan are sure to get salvation or ultimately reach Him. Bhagavaan does not mind what the attitude is or what the feelings are towards Him as long as one thinks of Him constantly.

Example for filling their hearts with kaamam is Gopikaas. Shishupaala and Danthavakthra were constantly connected to Bhagavaan with krodham or anger and both of them attained moksham by embracing death by His hands. 

Kamsan attained moksham by continuously remembering Lord with intense fear of death by His hands and he also attained moksham. Maatha Yashoda is an example of showering unconditional love on Lord Krishna. Madhyama Pandava, Arjuna loved Him as a friend.

Old Sufi proverb says: "You can meditate for fifteen years and get one inch closer to God; or you can be really angry and be with Him instantly." Also Ramana Maharshi says: "He wants only to be remembered. The mood in which you remember Him is of less importance"

This kind of negative intense feelings towards God is called Samrambha yogam. Anger, fear, hatred etc include in this category. The reason to attain salvation faster may be that the emotion of anger etc are more intense and constant than that of love. But there is absolutely no enjoyment in this type of negative feelings and hence love of Bhagavaan or Bhakthi is the best way to attain Him. (Also it is relevant to remember devotees like Pingala who experienced intense devotion due to atonement-  with out any negative emotion towards Bhagavaan - attained moksham soon.)

Swami Shivananda's words about this expresses the greatness of Bhakthi yoga:

"Bhakti softens the heart and removes jealousy, hatred, lust, anger, egoism, pride and arrogance. It infuses joy, divine ecstasy, bliss, peace and knowledge. All cares, worries and anxieties, fears, mental torments and tribulations entirely vanish. The devotee is freed from the Samsaric wheel of births and deaths. He attains the immortal abode of everlasting peace, bliss and knowledge.

The fruits of Bhakti is Jnana. Jnana intensifies Bhakti. Even Jnanis like Sankara, Madhusudana and Suka Dev took to Bhakti after Realization, only  to enjoy the sweetness of loving relationship with God.

Knowledge or wisdom will dawn by itself when you practice Bhakti Yoga. Bhakti is the pleasant, smooth, direct road to God. Bhakti is sweet in the beginning, sweet in the middle and sweet in the end. It gives the highest, undecaying bliss."