Kaarttik Maas is the 8th month of the Hindu Lunar calendar year. Kaarttik Maas is a very holy and important month for Hindus - Many people observe fast, do Snaan, do Deep Daan, Paath, give Daan etc. Following are the other Vrat to be done in this month---

(1) Maasopavaas Vrat
Do this Vrat after doing all Shaastra prescribed Vaishnav Vrat, and Dwaadashee Vrat. After keeping fast on Aashwin Shukla Ekaadashee, one should take up this Vrat. Worship Bhagavaan three times a day with flowers, sandal, Naivedya, Dhoop, Deep etc. Man, or woman, or widow, whoever takes up this Vrat should be busy in singing Vishnu's names. He should not lie, be kind to everybody, do not kill anybody. Remembering food, seeing food, smelling food, tasting food, talking about food, and eating food - all are not permissible during these days. After keeping fast for one month, worship Vaasudev. This Vrat is for 30 days by count, not one day less, not one day more. Worship Vishnu on Kaarttik Shukla Dwaadashee with flowers, sandal, garland, Naivedya, Dhoop and Deep etc. Feed Braahman and give Dakshinaa to him or them. This is the method of Maasopavaas Vrat method.
[Padm Puraan, 5/14]

"One should start Maasopavaas Vrat after doing Vaishnav Yagya, taking permission from Guru, and estimating one's own strength. This Vrat is prescribed for Vaanprasthee, Sanyaasee and widows. Keep fast on Aashwin Shukla 11th and take Sankalp for 30 days - "Hey Vishnu, I am starting my 30 days Vrat from today and will be without taking food until it is finished. I will worship you during this period. If I die during this period, my Vrat should not be broken by your grace."

Vratee should take bath three times a day, worship Vishnu three times a day and do Jap. He should not enter into arguments, should not wish for wealth, should not touch any person who is not observing Vrat and live in peace. If he can live in any temple it is good. Vratee should feed a Braahman on Kaarttik Shukla Dwaadashee after worshipping Vishnu. Thus by observing this Vrat 13 times one attains pleasures and Moksh. After these 13 Vrat, one should do its Udyaapan - do Vaishnav Yagya, feed 13 Braahman and donate clothes, pot, Aasan, umbrella, shoes, Yagyopaveet etc to all of them. Worship his own and Vishnu's golden idol on a bed, and donate it to some other Braahman. He shoud say to him - "By the grace of Vishnu, I will go to Vishnu Lok after being free from my sins. Now I assume Vishnu's form." The Braahman should say - "You go to Vishnu's Lok." If such a man becomes unconscious, give him milk mixed with Ghee." The following things do not spoil Vrat - Havishya taken by the permission of Braahman; milk and medicine taken by the permission of Guru, water, roots, and fruits."
[Agni Puraan, 23]

(2) Kaarttik Krishn Pratipadaa - Brahmaa Vrat
Kaarttik, Aashwin and Chaitra Maas Krishn Pratipadaa Tithi are Brahmaa's Tithi. After keeping fast on Poornimaa, one should worship Brahmaa Jee next day on Pratipadaa with the Mantra "Aum Tatsad Brahmaney Namah" or Gaayatree Mantra. Do this Vrat for 1 year.
[Agni Puraan, 20]

(3) Kaarttik Krishn Shashthee - Skand Shashthee Vrat
If one eats only fruits on Kaarttik Krishn 6th and offer Arghya to Kaarttikeya, he attains both pleasures and Moksh.
[Agni Puraan, 20]

(4) Kaarttik Krishn Trayodashee - Dhan Teras
Dhan Teras falls on Kaarttik Krishn Trayodashee. On this day people worship Lakshmee Jee and buy gold jewelry, silver or brass utensils.

(5) Kaarttik Krishn Chaturdashee - Shiv Chaturdashee
On Kaarttik Krishn 14th, keep fast, and worship Shiv. Do it on every Krishn 14th for 1 year. This gives long life, wealth and pleasures.
[Agni Puraan, 21]

(6) Kaarttik Krishn Chaturdashee
Take bath and draw Indra on a flag fixed on a bamboo. By worshipping Indra thus Vratee becomes happy.
[Agni Puraan, 21]

(7) Kaarttik Krishn Chaturdashee - Narak Chaudas
This day Krishn killed Narakaasur, that is why it is called Narak Chaudas. While dying he asked the boon from Krishn that whosoever will worship him on this day he would stay away from Narak (Hell). That is why people take bath after massaging oil on the body in the morning and worship Yam Raaj by light lamp outside their houses to keep him away.

(8) Kaarttik Shukla Dwiteeyaa - Yam Dwiteeyaa
In Kaarttik Maas, on Shukla Dwiteeya (2nd Day), one should worship Yam Raaj; then keep fast on every Shukla 2nd thereafter. This man never goes to Narak.
[Agni Puraan, 20]

(9) Kaarttik Shukla Dwiteeyaa - Kaanti Vrat
Start this Vrat on Kaarttik Shukla 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]

(10) Kaarttik Shukla Navamee to Ekaadashee - Tri-Raatra Tulasee Vrat
Start on Kaarttik Shukla Navamee, and continue to Dashamee and Ekaadashee.
[Padm Puraan, 5/1]

(11) Kaarttik Shukla Navamee - Aanwalaa Navamee
It is believed that by worshipping Shree Hari under an Aanwalaa (Aamalaa) tree, one gets children.