Go back in between and return on cooldown from wartable missions.
You should have given more information 
Now that I arrived in Skyhold, I nearly understand what was meant.
The game works like this:
The Wartable contains missions, zones and tasks.
Missions have a green breach symbol and progress the main story. You need to go there yourself and it usually includes a cinematic.
Zones have a conic icon and unlock new places to go to. No Advisor or yourself involved, once unlocked you can fast travel there.
Tasks have just a flag and are a way to get information, loot, influence, material, agents, crafter and supplies (nearly anything). Done by one of your three advisors.
Whenever any of your advisors is finished with a task, you should tell him/her to do the next at the wartable.
If all three advisors are busy, you can go into one of the already unlocked zones and do side-quests on your own.
Unfortunately there is no manual to the game, where all this information is given beforehand.
Either way, I don't think you can miss out as long as you do not rush the main quest missions.
//edit:
Missions may unlock additional Missions and Zones.
The quests in Zones or dialogue options with companions and other characters may unlock additional Tasks.
Agents could for example speed up the advisers missions in the zone they reside in, give additional missions and all kind of things. List of Agents: http://uk.ign.com/wi...Agent_locations
Retour en haut
Mate, main quest in DA:I is the worst part of the game. Enjoy side stories, those are done much better.
