Center of the map
Try to get to the center of the map. This is the greatest location to gather resources, even if it indicates more enemies will attack from all sides. Do it if you require to desert a little outpost to take control of something better to the center. You can recycle a core to construct an additional base, even if you lose some resources while doing so.
Collecting rewards
When someone loses a battle, these are normally left behind. Including them to your storehouse leaves them susceptible when somebody attacks; they can take these benefits for him or herself. You can leave them and select them up later on - they will not vanish gradually - so attempt to conserve these items for when you definitely require them.
Item Boxes
Watch out for item boxes. Spread throughout each location, they differ in 3 colors - silver, gold and bronze. The greater the quality, the better they are. They'll enable you to make use of rarer and more powerful cores for your bases. Simply see to it you do not lose them.