How do I know which quest is the main quest, and which are just side missions? I've reached a point where it is ambiguous of what I need to do specifically, and the galaxy map is no help.
Edit: to be more specific;
I seem to have completed "Priority" quests, but the current "Priority" quest just tells me to do other quests while I wait. Is this how the quests play out? Priority quests just cause branching that must be completed?