Congratulations! You haven't committed any mortal sins in recent memory, received absolution for sins quite some time ago and your soul is spotless. You think you don't need to go to confession - after all, the Church only requires confession of mortal sins once a year and you certainly don't meet that requirement. Your soul is in great shape and you are obviously in Heaven. Please intercede on my behalf and for the rest of us who continue to struggle with concupiscence. Seeing that you already have your white robe and dwell with those who died marked with the sign of faith, I dedicate the remainder of this post to the rest of us.
Confession is not easy. Certainly, it is not complicated and the process is actually quite straightforward. Facing the state of your soul and uttering the words out loud is the hurdle so many allow to be a barrier to the Confessional. There is no 'easy button' when you enter the Confessional. In preparation, your conscience pains you as you go over what you have done and what you have failed to do. Parched, your soul longs for freedom from the bonds of sin. Millions of our brothers and sisters - perhaps you, Dear Reader - avoid the confessional because of excuses they place before themselves. Some believe that the hours are inconvenient. Perhaps others had a bad experience once and refuse to ever go again. Maybe they think that God will never forgive them or perhaps they believe the sins to be too embarrassing to mention. Others simply don't remember how to make a confession and are afraid to appear foolish. Believe it or not, there are anonymous online confession websites. Why? Because people cannot bear the weight of their actions - or inaction - any longer and cannot or do not avail themselves to the Sacrament.
Rest assured, God will forgive any sin confessed with a contrite heart. If the hours are inconvenient, schedule an appointment with a priest - they do that you know! If you had a bad experience, ask a friend about who is his or her confessor and about their own experiences. You don't want to go to hell just because Fr. O'Malley yelled at you in the third grade! If you are worried about being embarrassed - don't be. Priests have heard everything - and probably many sins you cannot even imagine. Don't remember how to confess your sins? There are many excellent guides to confession, including an examination of conscience. Here is one example online (a .pdf file) from the Knights of Columbus.
Fr. Larry Richards has assembled a simple yet thorough list of sins which must be confessed HERE. A sample from his list: rudeness, reckless driving, hatred, calumny, pride and despair.