Working on the night preceding Pesach: Pesachim 55a
Continuing work which began before the 14th of Nisan began: Pesachim 55a
Customs for doing work on Eve of Pesach before mid-day: Pesachim 50a, 51b, 55a, 55b
What time the prohibition against work starts, in a place where there is such a prohibition: Pesachim 2b
Tailors, Barbers, Launderers, Leather-Workers, until mid-day: Pesachim 55a-b
Differentiating between work which is/isn't necessary for Holiday: Pesachim 55a-b
Starting a task which will be finished on the 14th: Pesachim 55a
Placing an Ex-Communication on one who works after mid-day: Pesachim 50b
Prohibiting work in Jerusalem, where many Customs mix: Tos. Pesachim 14a #1
Placing an egg under a chicken, replacing the same chicken, exchanging chickens: Pesachim 55b
Sweeping underneath an animal, in various ways and locales: Pesachim 55b
Bringing vessels to and from an artisan: Pesachim 55b
People of Jericho grafted palms on Eve of Pesach, and the Sages didn't protest: Pesachim 55b, 56a; Menachos 71a
Having the students leave the Study Hall: Pesachim 109a, Succah 28a
Eating
Not Eating from just before the later time of the afternoon prayer [9 1/2 hours into the day], or the earlier time [6 1/2 hours into the day]: Pesachim 99b-100a, 107a-b
Not eating, so as to be hungry for Matzah: Pesachim 99b, 107a-b
Not eating, to prevent one from carelessly missing the time to do the Pesach Offering: Pesachim 107a-b
We do not gauge via a person's personal standards of hunger, in forbidding eating to prevent satiation: Pesachim 107b
Eating Targima [a sort of snack food] or vegetables after the forbidden time: Pesachim 107b
Eating a snack of intestines after the time: Pesachim 107b
Allowing the Servant who prepares the meal to eat: Pesachim 107b
Drinking wine after the time [in order to induce appetite]: Pesachim 107b-108a