Rules beyond the standard

[The Dungeon Master]

Death: If you die and are unable or choose not to be brought back, create a character 1 level lower than your previous character was at time of death (Campaign)

Sapient Mounts: Intelligent mounts act on your initiative (either before or after you, at your choice) (DMG p.23)

Skills with Different Abilities (DMG p.33)

Striking the Cover instead of a Missed Target variant (DMG p.24)

What Disabling a Device Means (DMG p.70)

[The Dungeon Master]

Identifying Magic Items (as expanded by the Magic Item Compendium)

Knowledge (Arcana) DC 30 - may reveal only some details; usually most helpful with legendary items

Search DC 15 - if a physical clue exists on the item, it may provide a clue

Spellcraft DC 10 + whatever is required to determine the school yields functions, means of activation and number of charges

Spellcraft DC 25 to identify potions; takes 1 minute and no retry for failure

Use Magic Device DC 5 + whatever is required to activate the item

Bardic Knowledge DC varies, as do the results

[The Dungeon Master]

Magic Armor
As long as the armor is the same general shape and the same size category, it will fit

[The Dungeon Master]

Initiative
I will be asking for initiative rolls at the beginning of each session and at the end of each encounter. These will be used for the next encounter.