I looked on the help forums and didn't find this, so thought I'd start it. With many of us coming back, and hopefully new players joining, people are going to be resource hunting. I, for one, often forget what's where. So thought a list might help.

T1: New Trismus is a good place for new players.
T1 Essence also can be found on Wisp Isle near Sakon
T1 Sandstone and Bronze are near Parsinia
T1 Cedar is outside Kion as well as up near Parsinia