Srimad Bhagavatam on the 5 attitudes that invite Bhakti faster:
1. I am Sick and Tired (3.25.7) Devahuti
2. I'll Show Them (4.8.37) Dhruva
3. Never Again (5.828, 29) Bharat Maharaja
4. Love/Want to serve Guru (7.9.28) Prahalad
5. I need Help (SB 8.3.20,21) Gajendra