Before Kol Nidrei, some have the custom to recite the entire Viduy individually. [Many recite nine chapters of Tehillim (115-122 inclusive) after Viduy. The Lubavitcher Rebbe would often start the Nigun of Avinu Malkeinu before Kol Nidrei.]
At least three Sifrei-Torah are taken out and held near the Chazzan. [If a Shul has only one Sefer-Torah, at least two people should still stand near the Chazzan.]
The Chazzan recites Kol Nidrei three times, each time raising his voice more than the previous time.
Each congregant stands and recites Kol Nidrei with the Chazzan word by word, quietly but audibly enough so that it may be heard by those closest to him or her.
Everyone needs to understand word for word the prayer of Kol Nidrei, therefore, it should be said audibly in the language most comfortable to the person.
The Chazzan recites V’nislach three times before the congregation does.
One should quietly begin Shehecheyanu with the Chazzan, but hasten to finish before him, in order to answer Amen. One who said Shehecheyanu when lighting candles does not repeat it now.
One does not kiss the Tzitzit of his Tallit during Shma.