first make knowledge,about more and more reading then you find all the ways of making predictions.

See, what I want is to prepare the horoscope of 'x' person from his birth date, birth time, birth place now i don't have almanac to refer vital parameters required for building of horoscope under such condition which formulae should I apply to above said birth parameters so that it will be easier for me to prepare horoscope.

Use a Software or else compare the Birth details with a Horoscope you know of a person who born in nearby time.
But for that you must know Gochara Transit details and also speeds and times of planets. It is the only way out.

With Software everything is done correctly while with second method, deatailing varies to 60-80% depending on the correct calculation.

Dear,
Astrology is the very tough subjects and it totally depends on the time,by the astrology there are many ideas are indicates for the calculations.
Calculations of minuets by the Navmansa
Calculations Hours by Lagan
Calculations Time of days by the Moon,
Calculations Time of Months by the Sun
Calculations Time of years by the Jupiter.
Calculations Time of more years by the Satrun,
Calculations Time Insouciant by the Rahu.
Calculations by the Talk
Calculations by the signs
Calculations by the Mood
Calculations by the Name of day
Calculations by the name of fruits.
Calculations by the Nadi,
Calculations by the asking relations
Calculations by the save of person.
Calculations by the face
Calculations by the palmistry
Calculations by the Meditations
Calculations by the Time Horary
Calculations by the Alphabet

and there are more ideas,in everywhere,everytime,by everyone.

Ramendra Singh Bhadauria
Jaipur