What a great list of eight suggestions for writers. Each of them will move you farther on your path to publication. I don't think I need to add anything more to the list. Each point is pretty clear.
It's such a good list that you might consider printing it, then place the list somewhere in the area where you write. Too often, we read something worthwhile and then forget about it. Out of sight, out of mind!
Read it and heed it!