If like me you have struggled to play triggered effects at the correct time in the sequence of play, I have compiled a list of these effects I found in the cards in the Core and expansion sets and placed them relatively to sequence chart extracts according to the rules, FAQ and latest clarifications from Nate. I also give an example of a card for each one of these. I only omitted the "during X phase" triggers as they are ususally condition specific (in addition to time specific) and tricky to place in the chart.
I hope this may be useful. Also, please let me know if I missed some or if I made some errors.
Forced: Before X is dealt damage
Forced: After the players quest successfully
Forced: After the players have quested unsuccessfully
Forced: After resolving a quest to which X was committed
Forced: After this stage is defeated
Forced: At the end of the quest phase
Phase 3 : Quest
…
Step 2: Staging
Forced: Before X is dealt damage [Patrol Leader KD] (e.g. Thalin's effect)
Step 3 : Quest Resolution
Willpower > Threat
Forced: After the players quest successfully [The Hunt Begins THFG]
or Willpower < Threat
Forced: After the players have quested unsuccessfully [Dungeon Jailor]
If Location/Quest complete, advance Location/Quest
Forced: After resolving a quest to which X was committed [Escort from Edoras AJtR]
Forced: After this stage is defeated [The Capture TDM]
Player Actions
Forced: At the end of the quest phase [Gollum TDM]
Forced: At the beginning of the encounter phase
Phase 5 : Encounter
Forced: At the beginning of the encounter phase [Attercop, Attercop RtM]
Step 1 : Player Engagement
…
Forced: When X attacks
Forced: When X attacks, deal Y to defender
Forced: At the beginning of the combat phase
Forced: After a shadow effect dealt to X resolves
Forced: After X/it attacks
Forced: After an attack in which X defends resolves
Shadow: After this/its attack resolves
Forced: When X is attacked
Forced: Before X is dealt damage
Forced: After an attack in which X attacked resolves
Response: After attached hero attacks and destroys an enemy
Forced : at the end of the combat phase
Shadow : after combat
Phase 6 : Combat
Forced: At the beginning of the combat phase [Ambush RtM]
Deal Shadow Cards
Player Actions
Enemy Attacks
Step 1: Choose an Engaged Enemy
Forced: When X attacks [Dol Guldur Beastmaster]
Step 2: Declare Defender
Forced: When X attacks, deal Y to defender [snow Warg TRG]
Step 3 : Resolve Shadow Effects
Forced: After a shadow effect dealt to X resolves [Nazgul of Dol Guldur]
Player Actions
Step 4 : Determine Combat Damage (combat is resolved)
Forced: After X/it attacks [The Witch-king TmaO / Wargs]
Forced: After an attack in which X defends resolves [Winged Guardian THfG]
Shadow: After this/its attack resolves [Rauros Fall THoEM]
Player Actions
Player Attacks
Step 1 : Declare target and attackers
Forced: When X is attacked [Grasping/Trashing Tentacle TWitW]
Step 2 : Determine attack strength
Step 3 : Determine Combat Damage (combat is resolved)
Forced: Before X is dealt damage [Patrol Leader KD]
Forced: After an attack in which X attacked resolves [Vassal of the Windlord TDM]
Response: After attached hero attacks and destroys an enemy [blade of Gondolin]
Player Actions
Discard remaining Shadow Cards
Forced : at the end of the combat phase [Goblin Sniper]
Shadow : after combat [Wolf Rider]
Forced: during the refresh phase
At the end of the round
Phase 7 : Refresh
…
Step 2 : Raise Threat by 1
Forced: during the refresh phase [Gladden Fields]
…
Player Actions
At the end of the round [Gandalf]