How do you farm fast at Warcraft Dota?

you need high mana capacity and regeneration so you can spend a few skills on creeps when counter-pushing and when neutral farming. You'll also need to understand how skills work. Geomancer's Poof farms efficiently when your starting and finish points are the same. Razor's Plasma Field is most powerful when you check your distance right. Cleaving attacks are useful for most melee heroes, thus, the Battle Fury. Non-orb ranged heroes usually get Mjolnir for killing multiple creeps, or S and Y for attack speed and survivability if interrupted by heroes while farming. Look for items that amplify your skills.

And finally, LAST HIT. The better you are at last-hitting creeps, the more money you make.

Oh yeah. Then there's the sentinel's strategy at the lower lane. Go to the neutral creeps farm closest to the lower lane, wait for the Sentinel Creeps to get close, then as they approach, attack the neutral creeps once, drawing their attention. They should chase you down all the way to the lane, where the Sentinel Creeps will help you kill them. This is used to stop the enemy from receiving experience and gold, and allows you to go neutral farming at levels 1-6.