Burn the chametz you found last night during bedikas chametz, as well as any other chametz that will not be sold.
Do not recite the second Kol Chamira, nullifying any remaining chametz—this will be said tomorrow. Do say the accompanying Yehi Ratzon.
The chametz should be burnt before the end of the fifth halachic hour of the day, (as we do every year, even though we will still be eating chametz for some of tomorrow). For the exact time in your location, visit www.chabad.org/zmanim.
Today, before the time for burning, search all clothing pockets where chametz may have been placed.
Before this time, remove all chametz from your possession, besides for the chametz which will be eaten during the Shabbos meals, which should be kept in a secure location.