Learn the tech tree. The tech tree consists of the series of related buildings and upgrades that you must make to create new units. For instance, World of Warcraft can't be created at the barracks until you've built a blacksmith. Keep in mind which new buildings you need to WOW WoTLK Classic Gold unlock the various weapon, armor, and ability upgrades. Whenever you have spare resources that aren't being devoted to units or buildings, spend them on an upgrade.

The Races

Gone are the chessboard days of World of Warcraft, when each unit on the human side had an identical counterpart on the orc side. As in Starcraft, the races in World of Warcraft all have their own unique units with diverse strengths and weaknesses. There are a few constants among the races, though. First and foremost, heroes are the key to any battle. Though a hero is just one unit, its presence or absence and use or misuse will make or break your chance of success. Learn the heroes and their special abilities inside and out, and you'll have a substantial edge in combat. Of course, the normal units aren't to be ignored. Every unit has some useful function, and using them all properly is the path to victory.

Humans

The humans are your basic bread-and-butter race in World of Warcraft. They adequately cover all the categories of attack and defense--melee, ranged, siege, spellcasting, and flyers--but they don't have any overwhelming strengths or glaring weaknesses. A skilled, well-rounded player can do a lot with the humans.

Human Production

The humans use the standard World of Warcraft resource-gathering model that's been in use since the first game. Peasants walk between the town hall and a gold mine to bring gold home, and they must walk up to trees to chop them down and haul them back to the town hall or lumber mill. There are a few things you can do to expedite resource gathering for the humans. Chiefly, build a lumber mill as close to your largest cluster of buy WoTLK Classic Gold trees as possible. This will reduce the walking time required for peasants to get back and forth. You can also upgrade your lumber production rate twice at the lumber mill. The humans have a pretty high overall lumber requirement, so the more wood the better. Also, make sure you have five peasants mining a gold mine at all times for maximum output.