Yes, “rules,” I’m talking to you.
Only use “said” or “asked” as dialogue tags? Poppycock, I say! Use whatever dialogue tags you want! I, for one, appreciate a little creativity and variety in dialogue tags. To me, using almost solely “said” or “asked” is kinda lazy. Don’t get me wrong; there is such a thing as going overboard on the tags, but use what works for you. And even I will admit, writing action or scene description in place of any tags works well a lot of the time, but it can becomes just as tedious as using only “said” or “asked.”
Don’t use adverbs? F*ck that. You may not want to use too many, but don’t let fear of adverbs prevent you from writing your scene the way you want. Sure, finding stronger and more descriptive verbs might work a good bit of the time, but maybe you want to use “smoothly” or “violently” or “softly.” Again, use what works for you. It’s your writing, after all. You don’t have to do a search for all words ending in “ly” in your document and eliminate all of them.
Avoid passive voice? Eh. I’ll admit that it can sound boring from time to time, but sometimes it works better than rewording the sentence ten times to make it non-passive.
Use third person omniscient only if you can execute it properly? Well, how in the Sam hill are you going to know if you are able to pull it off if you don’t at least try? For all you know, you could be a natural at it. Even if you’re not, you can practice and learn.
I could go on forever, but by now I’m sure you see my point: if you follow the same rules as everyone else, your writing may end up sounding like everyone else’s. You are your own person. Find your own voice, rules or not.