According to our Hindu Veda's (Bible's) Anushthan is a formal elaborated Vrat for any person wishing to attain certain purpose to be fulfilled.
How to perform VRATS and Anushthan VRAT
Wake up early, bath / shower and sit comfortably to pray. Either by doing certain mantras that you were given by a priest or by praying with your soul.
A person should keep clean and pure, observe celibacy, speak the truth, practise self-control.
Avoid non-vegetarian foods (e.g) sea food, poultry, eggs, alcohol, Onions, Garlic, Pumpkin, rice, grains, honey, observe celibacy and not see and hear bad portrayal of any kind.
According to our Hindu Veda's the consumption of food and drink should NOT be in our body system least 3 days before the day of any Vrat taking place.
Rasa Parityaga : giving up favourite foods.
Do not avoid hunger. You may eat fruits, drink milk & water.
If you are not sure about fasting and or taking medication of any kind, please consult your doctor for advice.
One should never start the observance whilst impurity is in presence brought by birth, death or feminine cycle in a Immediate family.
The commencement of Vrat should begin on a auspicious day and time.
The Sanskrit word " Vrat " denotes ‘religious vow. It is one of the most widely used words in the Hindu religious and ritualistic literature.
Vrat signifies a set of rules and discipline. Hence ‘Vrat’ means performance of any ritual voluntarily over a particular period of time. The purpose is to propitiate a Deity and secure from it what the Vrati (person fasting - needs are). This whole process, however, should be undertaken with a Sankalpa (binding solace promise) on an auspicious day and time fixed as per the dictates of the Hindu religious encyclopaedia called Panjika.
Vrat in the Purans : Various Purans signify various types of vrat's.
" Kayika-Vrat ", It is a vrat pertaining to the body.
The stress is on physical austerity like fasting, remaining sleepless, taking baths and such other restraining activity in connection with one’s body.
" Vachika-Vrat " , pertaining to speech. Here much importance is given to speaking the truth and reciting the scriptures, both being a function of the organ of speech.
" Manasa-Vrat " , pertaining to the mind. The emphasis here is on controlling the mind, by controlling the passions and prejudices that arise in it.
Time based Vrat : There are vrat's again based on time. A vrat can be performed just for a day. One lasting for Paksh (week or fortnight) " Paksh-Vrat ". One to be undertaken on a particular Tithi (a day according to the lunar calendar) or when a particular nakshatra (Astronomy) is on the ascendant, is respectively called a " tithi-vrat " or " nakshatra-vrat "
Most of the vrat's now in vogue (common) and are based on the tithi's of the lunar calendar. Based on deity (Gods & Goddesses) Demi Gods (minor deity, angel's). Vrat's can be taken for the deity (an aspect of God) worshipped for instance, Swarna-gauri-vrat is dedicated to Gauri, another name of Parvati Devi. Likewise Vara-siddhi-vinayaka-vrat is for propitiation of Lord Ganesh or Satya-narayan-vrat to Vishnu known as Satyanarayan.
The 10'th verse, 22nd Chapter of Bhagavat Puran, mentions young marriageable daughters (gopis) of the cow- herd men of Gokul, worshiping Goddess Katyayani and taking a vrat or vow, during the entire month of Magshar , the first month of the winter season, to get Lord Krishna as their husband or similar.