I'm not a Christian, but Jesus' death and resurrection is important, in the sense that all great stories are important. They concretize things, take abstract ethical priciples ("Love thy neighbor") and give them force ("Jesus was tortured and forgave his torturers; he died so you could be redeemed"). The Passion (thanks, Mel, for rescuting a great word from romance novel Hell]) is one of the best stories, and the holiday is a good day to pray or reflect or just spend time with your family.
I worked and my family did our minor fighting/hanging out/ talking (Mom, not the most computer literate person in the world, is proud that I got on the front page of this site with my Thunder Road bit).
Schedules prevented a big dinner and the closest I got to trancendence was when I missed a girl so powerfully that my whole world seemed to shatter, and I knelt down, weeping, wanting to stumble into a church (the guest pastor today was from New Jersey, i am told, the girl's home) or a movie theater and pretend I was crying in religious ectasy. It may have been something like religious ectasy. It was certainly profound-- pain that strikes you like a thunderbolt, reminding you that the rest of your life is an illusion, is pretending you don't feel this strongly about her. It hurts, but its beautiful-- you know you're not making it up. Those tears are hot, and they aren't being controlled or thought about: they simply ARE.
That's the pain, then, the Good Friday. The other bit came in giving some money to a homeless man (not enough, i know, and did he really need it? but i had to do it) and listening to Johnny Cash. Religion my way, I guess. I'm not a believer, but I'm moved too much by music and the world around me to call myself secular.