A little tip (only works for dire) if you cut down trees around t2, you can farm creeps with a t2 tower buff (it gives +5 armor and 3 health regeneration) : r/DotA2
How to Get Better at Farming in Dota 2 to Improve your GPM
Dota2] Come Farm and Get Rich! These 6 Dota 2 Farming Tips are Efficient for the Carry — Steemit