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
I made a gold farming guide for my friend but he is in denial so maybe someone here will appreciate this : r/learndota2
How to Get Better at Farming in Dota 2 to Improve your GPM
The Only Farming Guide You'll Ever Need (Literally) - YouTube
3 FASTEST FARMING TIPS - HIGHEST CS EVERY GAME - Best Farming Patterns - Dota 2 Guide - YouTube