Clash of Clans Attack Strategy - Farming

Guidelines

The minimum requirements for this technique are:

Level 3 Archers
Level 3 Goblins

What to Do Before You Start Farming!

Get the "Sweet Victory!" achievement. This will be vital in helping you to save up Gems to get Builder's Huts (you should almost never spend Gems on anything else until you have all your Builder's Huts). I personally spent about US$10 on Gems and saved up a massive amount of Gems from clearing Obstacles and the occasional Achievement to get my five Builder's Huts; getting five is definitely worth it to be able to constantly spend the resources that you farm so you don't constantly fill up.
Army Setup

There are many repetitive attack guides which have many different army setups based on what works for the writer. This is the template that works for me while farming; Giants, Barbarians and Minions can also be used to clean up bigger bases that have massive amounts of resources, but the basis of this farming technique is picking off unprotected/barely-protected mines and collectors. This setup may work for you but it is all about using what feels right.

More info:http://clashofclans.wikia.com/wiki/Casklord%27s_Farming_Guide