Guide to map awareness

Introduction
This guide is for people who want to get better at League of Legends, but please don't come here knowing nothing about the game. Map awareness is not something you should learn until you are fairly competent. Bear in mind, most of this guide assumes you already use wards. If you don't use them, please read this warding guide first.
 

Guide to warding properly

One of the most lethal yet subtle tools at your disposal on League of Legends is wards. Say you buy 3 for 225g, and place them correctly. You spot an enemy coming in to gank, and avoid dying. The warding has already more than paid for itself. Even though they have a fairly short duration, they can give you easy ganks. It's not uncommon to see teams grab aces because of a single ward at the Baron. This is a short guide on how to use your little buddies efficiently.

Here is a comprehensive image with warding locations I found in the backwater pages of google. You may have to save the image to see it properly. :