**** I shoot my head! *Bang*The Judge has it right with her comment on your Rule 7 (I read each of my Chrons' posts at least three times to catch errors and ensure what I've written is clear). Treat each post that you make on the forum as a miniature story or essay and the continual practice will help your other writing no end. Your three posts so far in this thread are good examples - there's at least 15 grammar, spelling and punctuation errors between them.
Your points on apostrophes and their/there are, frankly, not something that I would include in a list of key rules - if you've problems with them, get a basic grammar book and apply it to what you write.
I won't go into your first two points, because I personally think they are pernicious rubbish made fashionable by the creative writing police. It's like "write what you know", which you'll often find given as advice for authors, and would bring all of science fiction and fantasy writing to a crashing halt if applied.
Here's a link to a post in WriteWords that you may find helpful: What advice would you give to a new writer starting out?