Venkateswara Puja is dedicated to Tirupati Balaji or Venkateswara form of Bhagavan Vishnu. Here is Venkateshwara pooja procedure in Tamil in pdf format. The puja is based on the guidelines given by Kamakoti mutt.
Link - Venkateswara Puja Procedure in Tamil pdf
The puja is performed for peace, prosperity and happiness in family. It is also done for success in business and new venture. The popular belief is that success in Kali Yuga depends on the blessings of Venkateshwara.
The puja is ideally performed on Thursday or Saturday. The puja should be performed in the early morning hours.