When it comes to learn English writing,what's the most important? It is doing the right thing and avoid the wrongdoing, which is what learning is all about. Doing right is its own reward; doing wrong is its own punishment. There is nothing worse than being in the wrong persistantly. Therefore a wise person is quick at learning from his or her own mistakes.
P.S.I am going to write a four liner on this forum from now on just for intellectual exercise and sharing fun with anyone interested, when I have time.