Whether destruction is specifically via Incineration, or other methods are also allowed: Pesachim 5a-b, 12b, 21a, 21b, 27b-28a; Temurah 33b, 34a
Method of destruction, if the time has arrived [and incineration is not necessarily available]: Pesachim 12b
Crumbling the Leaven before throwing it into the Sea: Pesachim 28a
Olive or Egg as the Amount of Leaven which would mandate returning to destroy the Leaven, instead of simply Annulling it: Pesachim 49a, 49b-50a
There is [not] a Mitzvah of destruction, not merely removal from one's property: Rashi Pesachim 21a "Kodem"
The use of Loaves from Thanks-Offerings in the Time of the Temple to display the time of suspension and of prohibition: Pesachim 11b, 13b
The use of Cows [plowing] on Mount of Olives to indicate the phase of Suspension/Prohibition: Pesachim 14a [See Tos. #1]
Benefitting from the Process which also Destroys the Leaven, after the Prohibition Begins: Pesachim 21b
When to destroy Leaven, if the Eve of Pesach is Shabbat: Pesachim 13a, 20b, 49a
Destroying Terumah before Shabbat which is the Eve of Pesach, instead of waiting until the time of Prohibition: Pesachim 13a, 20b, 49a