Economics 101
Running low on money and need more power? Instead of building an advanced power plant, build 2 regular power plants. It costs $100 dollars less to build the two regular power plants, and these plants have better armor than the advanced power plant. submitted by Semaj

Economics 102
Build a Tiberium Refinery. Sell the actual refinery and you will receive $1,000 credits. You end up with an ore truck. You save $200 credits. If you were to build and ore truck through a war factory, it would cost $1,200 credits. submitted by Richie

Sandbag "Prisons"
If you surround your entire base and the nearest tiberium field with sand bags, opposing units approaching your base, will stop and not shoot down the sand bags. You can then surround the units with sand bags and trap them inside. As long as you don't go near the cells with military units, they won't shoot down the sand bags. Wait long enough and you could have your own prison! submitted by Wojo

Sandbag Trick
To build things away from your base, use sandbags in a chain. This works with any building. You can use this trick to place your buildings in an enemy's base. submitted by Semaj

Sell Men
Place your Mini-Gunners really close to a sand bag wall and sell the wall. If your men were close enough, and it works right, your men have been sold. submitted by Mike