i would follow mor ephrem's advice.
also i suggest you focus on bad attitudes like anger, lust, rebellion, hate etc. these are at the root of various sins (yelling at people, rude emails to your boss etc.) so if you're like me and have a lot of sins to mention, you can shorten it by saying (e.g.)
i am mean to people, i yell at people, i keep wishing i had lots of possessions, i worry a lot instead of praying about things etc. etc. and then the priest can ask you to give examples where appropriate (i yelled at my friend yesterday, i wished i had my friend's fast car on saturday etc. etc.)
that way you bring forgiveness and healing to various areas of your life that have been not functioning properly.
it's not really about a list of "do"s and "don't"s.
if you are really sincere and ready to throw out everything that keeps you far from God, then God will guide you and you will be closer to Him.
may God bless u.