Terrans do not have to climb the tech tree in order to begin expansion operations on island maps; all you need is an SCV and enough minerals to build a command center. Once that's done, load up to five SCVs on the ol' neosteel saucer and fly over to a nearby resource node. Unload the SCVs, get some missile turrets up around the island's perimeter and begin collecting those precious crystals to further your war efforts.
- Upgrade to a planetary fortress if you expect any kind of ground assault (drops, nydus worms, stalkers, vikings). Remember, planetary fortresses cannot lift-off.
- Load SCVs onto the command center before heading off to an island. This way you can start building perimeter defenses the moment you land.
- Begin mining operations immediately, more resources means you get more units and higher tech faster!