A-Shoonya Shayan Vrat
This Vrat gives women their husband pleasure and man their women pleasure. One should start this Vrat on Shraavan Maas Krishn 2nd. Do this regularly for 1 year and worship Vishnu and Lakshmee Jee. Donate bed and fruits also. Offer Arghya on that day for Chandramaa with Mantra ( Mantra is given on p 365 of Agni Puraan ).
[Agni Puraan, 20;    Bhavishya Puraan, 1/7 ]

Dwiteeyaa Vrat
Eat only flowers on the Dwiteeyaa (2nd day) of every month, and worship both Ashwinee Kumaar. By doing this for 1 year, one gets good fortune and beauty.
[Agni Puraan, 20]

Kaanti Vrat
One should start this Vrat on Kaartik Shukla Dwiteeyaa (2nd). Keep fast in daytime and eat in the evening. Worship Balaraam and Krishn. After doing this for 1 year, Vratee attains beauty, long life and health.
[Agni Puraan, 20]

Phulera Doyaj
Falls on Phaalgun Shukla Dwiteeyaa (2nd). This day is related to Holee and is celebrated in Krishn temples of Mathuraa and Vrandaa Van. Special rituals are performed, Holee colors are smeared to Krishn idols. It is believed that the whole day is auspicious and therefore astrologers and Pandit need not be consulted for finding an auspicious time.

Pushp Dwiteeyaa Vrat
When this Vrat is done with eating only Havishya Pushp (flowers) it is called Pushp Dwiteeyaa, and when it is done with eating fruits, it is called Phal Dwiteeyaa or A-Shoonya Shayanaa Vrat (see above)
[Bhavishya Puraan, 1/7]

Shukla Dwiteeyaa
Start the Vrat from Kaartik Shukla Dwiteeyaa (2nd). One should worship Yam Raaj on that day; then keep fast on every Dwiteeyaa of Shukla Paksh. This man never goes to Narak.
[Agni Puraan, 20]

Vishnu Vrat
This Vrat fulfills all wishes. Start it with Paush Shukla Dwiteeyaa (2nd), and continue it for 4 days. First day take bath with mustard seed mixed water and worship Krishn's feet with "Shree Krishnaaya Namah" Mantra; second day take bath with black sesame seed mixed water and worship Krishn's navel with "Achyutaay Namah" Mantra; third day take bath with Bach named herb mixed water and worship Krishn's eyes with "Anantaaya Namah" Mantra; and the fourth day take bath with all-herb (Kapoor Kacharee, Bach, Kooth, Shilaajit, whole Haldee, Daaru Haldee, Kachoor, Champaa, Mothaa) mixed water and worship Krishn's forehead with "Hrisheekeshaaya Namah" Mantra offering flower. Offer Arghya to Chandramaa in Pradosh period. First day offer Arghya with "Shashine Namah", second day with "Chandraaya Namah", third day with "Shashaankaaya Namah", and fourth day with "Indave Namah". One should eat before Chandramaa disappears. Vratee should do this for 6 months or 1 year.
[Agni Puraan, 20]