Many problems that arise in making egg salad, chopped liver, tuna fish, etc. (Besides the issue of LOSH).
דבר דבר (Dabair Davar): How One Has to Be Careful When Talking;
הכנה ליום אחר (Preparations for a Weekday): Sleeping on Shabbos to Do Work or a Mitzvah on Motzi Shabbos;