Step 1:
Deploy your men around the MCV(the big vehicle), give it space to deploy, once deployed build a power plant and two refineries, then a hand of NOD, make 10 light infantries and deploy them around the base for protection.Make sure you keep on building power plants

Step 2:
Make a radar and a war factory, while they are building scout the enemy's base. Then build Two harvesters and 3 artilleries, tell the hearvesters to eat the green tiberium, and move the artilleries and deploy them by double-click on them, they will protect your base well.

Step 3:
Build two silos(do this alot during the game) also build another harvester. Then build tech centre and a stealth generator. also build a helipad.Then build some mobile repair vehicles and put them on guard mode (Ctrl+ALT)

Step 4:
Build a missile silo and temple of nod, then build some obelisks around your base, also pave off you base and deploy a mobile sensor array if you are playing against NOD. Then build a chemical war factory and about 5 weed eaters. Build some more artilleries, by the end you should have about 7.

That is a great foundation for a great base, you will be making money, and remember, build about ten harvesters and 2 more refineries. Look in the Tips and tricks and User added strats section for ways to attack.