A good read that adapts Leonardo Da Vinci precepts to trading:
Leonardo Da Vinci’s model for learning to paint, from his own notes:
1. Imitate a masters work — best to imitate an antique.
2. Draw objects from relief but not from memory.
3. Familiarity of the human form — seeing each muscle in every possible position.
4. Do stick drawings from nature and expand them at home.
5. “Thus I say to you, whom nature prompts to pursue this art, if you wish to have a sound knowledge of the forms of objects begin with the details of them, and do not go on to the second [step] till you have the first well fixed in memory and in practice.”
6. Keep the company of people who share the outlook of being mirror like in their observations. If such people cannot be found then keep your speculations to yourself.
7. “I myself have proved it to be of no small use, when in bed in the dark, to recall in fancy the external details of forms previously studied, or other noteworthy things conceived by subtle speculation; and this is certainly an admirable exercise, and useful.”
8. “Winter evenings ought to be employed by young students in looking over the things prepared during the summer; that is, all the drawings from the nude done in the summer should be brought together and a choice made of the best [studies of] limbs and body.”
9. He is a poor disciple who does not excel his master.
10. “Some may distinctly assert that those persons are under a delusion who call that painter a good master who can do nothing well but a head or a figure. Certainly this is no great achievement.
11. “Nature has beneficently provided that throughout the world you may find something to imitate.”
12. The mind of the painter must resemble a mirror.
13. “When, Oh draughtsmen, you desire to find relaxation in games you should always practice such things as may be of use in your profession”
14. “The sorest misfortune is when your views are in advance of your work.”