Sri. Sangom has given the right answer and I respect him for his boldness to write it as many brahmins today will scoff at such an answer. The code of conduct prescribed for the brahmin to follow on a daily basis in the dharma sastras and grihya sutras are very strict. However, Sastras also predict these are going to be very difficult to follow in Kali yuga. Today, even those brahmins adhering to priesthood as vaideekas cannot be classified as brahmins as they do it only for money and in most cases their conduct could even be below the brahmins who have taken a secular profession for livelihood. However, for those of us who have taken to a secular profession for livelihood, this is what I try to follow.
1) Try to do sandhyavandana on a daily basis at least once a day with 108 gayathris at least in weekends or holidays. Try to find some time on a daily basis or weekends to recite Rudram, Vishnu sahasranamam, Lalitha Sahasranamam, or small stotras.
2) Try to learn Sanskrit, and Hindu scriptures including that of the tamil sivanadiars and vaishnavite saints. Try to learn the mantras to perform the basic rites like Jatakarma, Namakarana, Vivaaha, Antheyshti, Shradda etc.
3) If we have more faith in the efficacy of the holy name of the Lord (Vishnu or Siva as per one's devotion), do nama japa and nama sankirtana with other devotees.
4) Never ever talk about brahminical pride or brahminical supremacy and thus become a "source of heartburn" for other Hindu communities. This will only weaken the brahmin community as other communities will then tend to convert to Islam or Christianity and a situation like Kashmir where the brahmin is completely evicted will arise.
5) Associate with other Hindu communities for congregational religious activities through organizations or at one's home, like Nama Samkirtana, samuhika poojas at temples, Volunteering for Annadanam related work, Group recital of Vishnu sahasranamam, etc.
6) Let us not try to look down other Hindu castes if they are non-vegetarians as long as they do not eat beef which most do not do. Eating meat is adharma only for the brahmin and not for Kshtra-Vaishya-Chaturtha dharmas whose vocations involve considerable physical effort. Keep in mind that many Rajputs, Marathas, Telugu Nayaks/Naickers etc who gave their lives to protect the brahmins, Hindu temples etc during brutal islamic invasions could do it because they could stay strong by eating meat also. However, as brahmins, we should follow vegetarianism and should abstain from vices like smoking, drinking alcohol etc.
7) Above all, let us try to use our retired life to strengthen Hindu religion among our Hindu brethren. This could be in various ways, like teaching slokas, bhajans, sanskrit, bhagawat gita, upanishads etc to Hindus of all castes possibly as a member of an organization like R.K.Ashram, Sivananda ashram, Vivekananada kendra, RSS etc. We could also do Pourohitya by doing basic ceremonies like Jatakarama, Namakarana, Vivaha (with all ceremonies like laja homam, sapthapadi etc) etc to all Hindu castes desiring to conduct these ceremonies or at mass wedding ceremonies organized by organizations. This will bring good bondage between brahmins and other Hindu communities and bring a sense of brotherhood. Such endeavors as I said before, shall discourage non-brahmin communities from converting to other religions which as I said can lead to Kashmir like situation. Such endeavors will act as a Prayashchitta for us to abandon our brahminical dharma mentioned in scriptures. This is my humble opinion only.
