It is better to use two strands of entwined wicks to light a lamp; if only one strand of wick is available, it can be folded with the two tips bound together to light the lamp; but if the two strands of wicks used get shortened over a period, one must not separate them into two different strands and reuse for lighting lamp. When using a single strand of wick folded with two tips together, use it to the extent possible and replace it. It is best to use two different wicks to light a lamp.
While partaking Perumal tirtham thrice, it is enough that one does so with devotion and there is no need to recite anything. Agama-s say it is auspicious or special to partake Perumal tirtham thrice.
For hair cut or shaving:
Mondays and Wednesdays are the best; Tuesdays and Saturdays must be avoided completely.
Tithi-s such as Ekadasi and other days of fasting must be avoided.
At any cost, it is prohibited on Sashti tithi.
Tithi-s such as Caturthi, Catudasi, etc. are also not that conducive.
Must be avoided on Ashtami, Caturdasi, Amavasyai, Paurnami, Ekadasi, Dwadasi.
Doing this on Fridays is harmful to a mother; a few whose mother is no longer alive choose to cut hair and shave on Fridays. It is similar to other tithi-s as well.
Whatever the other parameters for Mondays and Wednesdays, some say it is ok to cut hair or shave; but if the tithi on these days is Sashti, or if these days are Ekadasi and days of fasting, one must not shave or cut hair on Mondays and Wednesdays.
Must avoid haircuts and shaving during Bharani and Krittikai nakshatram-s.
As there are possibilities for a yagyopavitam to become tainted due to extraneous contacts, it is a practice to change them after every shave or haircut.
It is not a practice in our tradition to perform Perumal thirumanjanam without a vastram; but it is a practice at other places.