Do OT Leviticus Laws Still Apply to Us Today?

What attitude should we be reading all these rules and regulations that we see in Exodus and Leviticus? I guess I don't know what to think of being ceremonial clean. I understand when someone sins, he has to do the right things to get right with God again. But all the touching dead animals, monthly period, childbirth, and the whole paragraph on discharges...like what does that have anything to do with being spiritually clean? It sounds...kind of tedious, so I just didn't know what to think of it, or why God asked for these things to be done when the Israelites are just being human beings. How should we read these passages? How is it relevant to me now?