Amount of food which requires a blessing afterward: Succah 26b, 27a
Requirements for a Laborer who is being paid for his meals, or who is also receiving a salary: Berachot 16a
Making a Blessing after a Meal on Dates, because they satiate: Rosh Berachot 1:14
Making a Blessing after a Meal on Wine: Rosh Berachot 1:14
Making a Blessing after a Meal audibly: Berachot 15a, 15b, 19b-20a
If One started/completed a Blessing after a Meal instead of the miniature "Al Ha'Eitz [For Certain Fruit]" or "Al HaGefen [For Wine]" form: Rosh Berachot 1:14
Returning to make a Blessing after a Meal, if the partakers left, and did [not] leave someone sitting there: Pesachim 101b-102a
Reciting Kiddush if the partakers finished the meal, but haven't yet made the Blessing after a Meal, and Shabbat started: Pesachim 102b
For women, rabbinically or biblically: Berachot 20a-b
The Fourth ["HaTov VeHaMaytiv"] section of the Blessing after a Meal
Starting/Ending with a special "Baruch" section: Pesachim 104b
In honor of the miracle of the non-decay of the bodies of the Betar rebels in the years before their burial, and in honor of the granting of permission for their burial, the Rabbis of Yavneh established a fourth blessing, "HaTov VeHaMaytiv," for the Blessing after Meals: Taanit 31a
Zimun - Group Blessing
Requiring a Quorum for the group blessing with Gd's Name: Megillah 23b [2x]
Kohanim have precedence to lead the group: Megillah 28a
A Prohibition forbidding a Torah Scholar non-Kohen from allowing an unscholarly Kohen to lead the group: Megillah 28a
We earn special favor by thanking Gd for food even when we eat less than the amount that requires a blessing, transcending our obligation: Berachot 20b