Article submissions, the do's and dont's ?

Hey guys, I've been reading a lot of posts on the site recently so I finally decided to create an account to post .

Here is my question.

I'm going to publish an article to the article sites. But I have some questions before I do. I plan on submitting to about 350 sites total.

1. How many different versions should I create of the article, or how many times should I submit the same article without re-writing it?

2. How many should I submit a day and should I do the same ones in a row then change them, or should I get all the different versions of the article and submit in an order where a different version is submitted to the previous...

Basically to sum it up, how many times can I submit the same written article without a penalty, how many should I submit of it a day, and in what order all the same first or mix it up?

Thanks guys

I've read different opinions but I tend to agree with those saying that one article should not be submitted more than once. If you really want to, submit it a few times to maybe 2,3 or up to 5 directories that are not totally related to one another.
I might be wrong and submitting the same article lots of times might be the way to go. Still, in that case I would try to make as significant changes as possible and submit same versions of the article with a few days at least in between.