world of warcraft Gold

Attack the Enemy Gold Supply
Nearly every unit and building requires Gold to train or build. Skeletons are the only units that can be created without resources which instead require mana and the loss of a unit. If you cut off the enemy's Gold supply they will eventually run out of resources depending on how much they have stockpiled. Once the enemy has ran out of resources you should be able to build more units which will eventually allow you to over power the enemy defenses.

When invading, if possible head straight for the enemy Peasants mining Gold then attack them. This formation allows you to get plenty of hits on the Peons while they try to mine. The peons will walk right between the Ogres and Grunts which are placed on stand ground.
Go For the Peasants and Peons
When you invade, always kill the Peons first. When you attack enemy offensive units you're not really slowing the enemy down. They have created those units for the purpose of fighting and dying, but when you attack Peons that can be used to mine Gold, harvest Lumber and build buildings you are slowing down their economy. Whenever possible run past the enemy defenses straight to the Peons mining and harvesting. Split your forces sending half to engage the enemy offensive units using the other half of them to sneak in and kill the Peons. Although you will not win the battle against the enemy defending units if you kill the enemy's workers it will be worth it. The enemy will be forced to train more Peons which will eat up their resources or will forget to train more Peons to replace them which will put them further behind you.

Attack Peasants and Peons On Lumber
Rather than trying to kill the Peons on Lumber, tell a group of units to kill the Peons mining Gold, then take one unit and have it beat on the backs of each chopper. Hit one, then move on to the next Peon chopping Lumber. When the Peon is hit it will stop chopping Lumber and will have wasted any time already spent chopping Lumber. You do not need to kill these Lumber Peons, just attack each one once. Once you have killed the Peons mining Gold move on to the Lumber harvesting Peons as they will be most likely moved over to mining Gold after the attack if you let them survive.

Don't Kill Farms After Killing Large Numbers of Units
If you've just attacked a person and massacred all their army, don't attack their Farms because they will now have a huge surplus of food at that point. Destroying Farms is only damaging to the enemy when they are right at their Food limit. Instead find some other more important building to target.

Combat Takes Precedence Over Everything
Battles in Warcraft II require a lot of micro management. You often can't just tell your units to attack and move on to other things. You must control your units throughout the entire fight. Don't move the screen back to your town and start working on building. Watch! Make sure there won't be any opposition before taking you eyes off of the battle. The only reason you should leave a battle is to quickly train more units or instruct recently completed units to the battle. In these cases pick a good time to move from the battle and quickly return to the battle once you've finished giving new commands.