There are three ways to do something. You either try things out youselves. Experiment or play around with it. It strangely comes to you. You are never sure that that is the correct method. However, you can keep doing it functionally. The second is to be taught by someone else. This is mostly how trade practices are passed on from one generation to the next. The last is that you refer to a guidebook on the subject.
Like many people I have experienced the first two methods to learn to do things. I am just not the type of person to sit and read a guidebook about how to do things before I set about doing things. I am trying to inculcate this habit now. Might be useful.
Parallel Spirals 