This is in my prayer book:
O Father, Lord of heaven and earth, I confess to thee all the hidden and open sins of my heart and mind, which I have commited unti this present day; where I beg of thee, the righteous and compassionate Judge, remission of sins and grace to sin no more.
I don't know what to say when you're done, my book doesn't say. Usually just ends up with him asking do you have anything else to confess? and i say no.
Maybe you could throw out a general, "Lord have mercy on me according to thy great mercy" or something along those lines to signal you're done, unless someone has another idea.