Opinions  and methods of how best to engage in devotional services to Krishna are accepted by Him and if they align with His pure representatives . The example is generally given of the nine fold processes of bhaki , as general principles.

1. HEARING (sravanam) Maharaja Pariksit(the last seven days of his life, he constantly heard the Srimad Bhagavatam).

2. CHANTING (kirtanam) Sukadeva Goswami(spoke the Bhagavatam to Maharaja Pariksit)

3. REMEMBERING( visnu smaranam) Prahlada Maharaja(never forgot Krsna despite constant tortures from his father- Hiranyakashipu)

4. SERVING THE LORD’S LOTUS FEET (pada sevanam) Laxmi, the Goddess of Fortune, is always engaged in serving the lotus feet of the Lord.

5. DEITY-WORSHIP (arcanam) Maharaja Prthu used all of his royal possessions in order to offer them in pure devotion to the Lord.

6.PRAYING (vandanam) Akura offered prayers to Krsna when he was traveling to Vrndavana in order to see Krsna.

7. EXECUTING ORDERS (dasyam) Hanuman, the intimate servant of Ramacandra executed all of Sri Ramacandra’s orders despite all kinds of difficulties.

8. SERVING AS A FRIEND (sakhyam) Arjuna was so close to Krsna, that the Lord offered Himself to become his chariot driver and serve Arjuna and his brothers in various ways.

9. COMPLETE SURRENDER (atma nivedanam) Bali Maharaja gave Sri Vamanadeva his entire kingdom, his possessions as well as his own body, although his own spiritual master was against it.

These types of devotional services are spoken of in the Srimad Bhagavatam and are demonstrated by the Goswami’s of Vrndavana, and elaborations are taught by them throughout their litratures  Such loving services automatically and spontaneously aligns a devotees’ heart with the absolute , because they follow His devotees , although we can aspire to please Krishna,  we must learn what pleases Him best . The param para acaryas will know spontaneously in advance and be fully conscious of what is pleasing to Radha Krishna. Such devotional efforts will be soaked with devotional sentiments and based on understanding the absolute truth .There will be a complete absence of localised interests, thus they are all immediately harmonized with the absolute spiritual objective reality of a spiritual kingdom, and relished by Srimati Radharani, Sri Krishna and Their unlimited family and friends.
We could say in the words of Srila BR Sridhar Swami, the spiritually minded subjective thinker  communes with the super subjective plane .The working of Sabdha Brahman pure sound and the  Svarupa Sakti of the unlimited supreme Brahman are at work.

Much more on the developing devotional service soon .

The complete science of the sciences of trancendental matters with its various nomenclature are  given by Srila Rupa Goswami in his Bhakti Rasamrta sindu.
http://www.thevedicspectator.com