Guidelines for the devotional service

1. Take shelter of a bonafide spiritual master.
2. Receive initiation ( diksha) from spiritual master.
3. Serve the spiritual master.
4. Inquire & learn from spiritual master
5. Follow the footstep of holy persons devoted to the transcendental loving service of the Lord.
6. Prepare to give up all kind of enjoyment & miseries for the satisfaction of Krishna.
7. Live in a place where Krishna had his pastimes.
8. Be satisfied by whatever is sent by Krishna for the maintenance of body and hanker for no more.
9. Observe fasting on Ekadasi day.
10. Show respect to devotees, cows & sacred trees.

Source
Commentary on Bhagavad Gita As It is , Srila Prabhupad