I started writing some 'suggestions'. I had to get rid of what I wrote when I realized what's been written is what I think is best for me. I wrote about data structures, design patterns, machine learning and how to come up with a better feature vectors. I ended up arguing some school matrix and equation of a line in two dimension(you know that y=mx+c). I did almost hundreds lines without mentioning any programming language. I had to do ctrl A and delete to start all over again.