Responding to the offer of salvation

"...so also Christ, offered once to take away the sins of many, will appear a second time to bring salvation to those who eagerly await him." (Hebrews 9:28). How do we respond to this? Jesus wants to take away our sins; are we willing to give them to Him? How do we move past our sinful past? Each of us is the luckiest person to ever walk the face of the Earth? What do we do with that?