RCS stands for Reaction Control Systems. RCS is a simple but effective tool. RCS lets pilots glide after accelerating. this can be useful if you want to go in one direction but shoot the other.
Ship upgrades are almost always handy. If you are planning to stay in the same ship for a long period of time, upgrade your ship. This will help you in battle and for easier mining.
Converting your gems to credits is an important thing to know! This can really help you in games! You can buy some really powerful projectiles, drones, and mines!