When playing age of empries I, you can make the biggest empire ever, by doing this:
 
Make 30 villageres as fast as you can, and 5 axmen and 5 bowman, for protect the 
town, so with the villagers collect all kind of resources you'll need , and advance
through ages with minimal upgrades, now , depending the civ you have make the best 
warrior it has and begin producing as many as your resources allow you, remember 
to upgrade in benefit of the unit you will use. and that's it, when you are ready, 
use all your warrior and go for a absolute victory. Use an cavallary-archer 
civilization for best performance.