On this second part I go over what is probably the hardest part to dominate when you are a beginner, which is breathing and how it relates to the movements of the shoulders and head. Breathing is probably the most important factor that will make you change from beginner to advanced. It helps you float better in the water and it provides oxygen to all the muscles you will need to move in order to swim correctly. 

These tips and techniques will work best to help you improve dramatically your stroke if you do two things:
1- Focus on one thing at a time
2- Practice until you dominate that thing and move to the next.