1. I wear my prayer shawl at night
Kol Nidre is the only night of the year when we wear our tallitot (prayer shawls). Usually the prayer shawl is worn only for morning prayer. But Yom Kippur is considered by the tradition to be one long day filled with light. On this one night of the year, we don tallitot just before the Kol Nidre service (before evening has fallen) and we wear them throughout the day. We don't make the blessing when we don them again in the morning, because in a spiritual sense, it's as though we never took them off. We spend the whole night and day wrapped in holiness, enfolded in Presence.
When we recite the vidui (confessional prayer), we can knock on our hearts ("anybody home?"), we can gently massage our hearts (to get them to open), we can tap harder to break what needs to be broken-open in us. Only we know what kind of knocking we need.
On Yom Kippur we focus on all the places where we've missed the mark in the last year, all the ways in which we've failed to live up to who we know we can be. We ask ourselves: if this were the day of my death, if the work of my life had to stand as it is right now, through what would I be remembered?
But at the same time, on Yom Kippur we are incredibly close to the Holy One of Blessing. The gates of repentance are open to anyone who approaches them with an open heart. There is an infinite source of love available to us, and we are always already forgiven. We just have to come knocking.